Category: Weekly Reviews

Demon Slayer Episode 21

Demon Slayer Episode 21

Against Corps Rules

This week’s episode of Demon Slayer: Kimetsu no Yaiba wasn’t exactly the most exciting. There was no major battle, we weren’t introduced to any new demons, and because of these things there was no over-the-top animation. However, it was still one of the better episodes of the series.

I think last week I said that was the conclusion of the spider clan arc, but it turns out that this week’s episode was the real end. The Spider Silk Demon’s story was wrapped up, and the shift into the final arc of the season began. Or at least what I assume will be the final arc — there are only five episodes left.

But the fact that this episode included the transition between two arcs is partially why it was so good. We got some new information to wrap up the spider clan arc, and we got some new information to introduce the next arc.

World building hasn’t exactly been one of the strong suits for this series thus far. In multiple of my previous episode reviews I mentioned how the way the world works seemed to be retconned with each new episode. But it feels like we’re now at a point where this will no longer be an issue.

The benefit of longer series is that over time they can tie together the differing facts which were laid out near the beginning of the story. Think of it like story maintenance to fill in plot holes.

Now that Demon Slayer’s world has been around long enough to be established, it can turn its attention to fixing the inconsistencies in it. Look at any other, often shounen, series which is, or will be, longer than four cours and you’ll see this same thing happening.

Rui – Spider Silk Demon

For a few episodes now we’ve known that the Spider Silk Demon’s name is Rui. I just haven’t been referring to him as such because, to be honest, I kept forgetting it. Me being bad with side character names is nothing new.

But Rui’s name isn’t what I wanted to discuss here. Instead, we’re shown his origin story. Or rather, we’re shown the origin story of the Spider Silk Demon. Rui was originally a sickly child who had to remain indoors — that is, until Kibutsuji Muzan paid his home a visit.

It’s unclear exactly why Kibutsuji chose to “save” Rui, but we can assume he saw that Rui had the potential to be a powerful demon. In this case, Kibutsuji doesn’t turn Rui into a demon by force, but rather offers him a deal. If he gives up his humanity, he can have a new lease on life.

Much to his parents’ dismay, Rui takes Kibutsuji up on this offer and becomes a demon. But, at least at first, he tries to live a normal life with his parents. However, it didn’t take long for his parents to try to kill Rui due to his need to consume humans to survive.

And this is the important part: Rui kills his parents, develops his fixation on family bonds, and seemingly awakens his Blood Demon Art. Could the stress of losing, or potentially losing in Nezuko’s case, a strong bond be the trigger for Blood Demon Arts?

Even with the Taiko Demon it could be argued that this was the case. The bond with his father was severed due to his disapproval of the Taiko Demon’s writing. It all seems to be coming together, finally.

Shinobu vs. Giyuu

While Rui’s backstory took up roughly the first 10 minutes of the episode, after that is where the shift to the next arc begins. I’ll just call this the Hashira arc, and exactly what the Hashira are is something I’ll get into later on.

But what we need to know for right now is that both Giyuu Tomioka and Shinobu Kochou are Hashira. This is a title within the demon slayer corp, but it’s not one of the 10 levels of demon slayers. In fact, we the levels of demon slayers haven’t really mattered at all since they were first introduced.

Sure, some of the no-name demon slayers who were in the spider demon forest referenced various levels, but other than that we no nothing about them. Is there a formal test one needs to take in order to go up a level? Can demon slayers be demoted? We don’t know.

Shinobu Kochou vs. Giyuu Tomioka from the anime series Demon Slayer: Kimetsu no Yaiba
Shinobu Kochou vs. Giyuu Tomioka

However, what we do know is that the demon slayer corps rules call for the annihilation of any and all demons — including Nezuko. While Shinobu is willing to uphold this rule, Giyuu takes a stance against her to defend both Tanjirou and Nezuko.

This leads to something I actually hope to see more of in the series, a demon slayer vs. demon slayer duel. Sure, this isn’t something which would probably happen often since the demon slayers are all members of the same group, but they do still have individual differences which could lead to conflict.

The demon slayers may not try to kill each other, but duels between them could still be used to decide the balance of power between factions within the organization.

Kanao Tsuyuri

It was either last week or the week before that I mentioned the girl with the butterfly hair clip from Final Selection was probably related to Shinobu in some way. I don’t think her name was actually revealed in the anime yet, but I’m telling you it’s Kanao Tsuyuri so I can refer to her by her name for this section.

Kanao does appear to be an apprentice of Shinobu, so perhaps we’ll see Tanjirou become Giyuu’s apprentice in the future. However, even if she use the Insect Breathing Technique like Shinobu, which I’m assuming she does, she’s not a carbon copy of Shinobu. She doesn’t have the same fighting style.

Shinobu makes up for her lack of strength with her specialized blade which delivers poison to those she cuts. Kanao doesn’t rely on such a roundabout tactic. She has the strength to decapitate demons, and is shown to be fairly physically strong otherwise as well.

Kanao also wields a pink Nichirin blade which has unknown properties. I’m not sure what color blades Shinobu and Giyuu are supposed to have, but I wouldn’t call either of theirs pink. And I’d just like to remind you that this is only the third colored blade we’ve seen. We still know very little about them.

However, like her mentor, Kanao is a member of a specialized group within the demon slayer corp. This group, led by Shinobu, serves as the clean-up crew after battles against demons have taken place. Most of the members aren’t swordsmen, and they instead serve as a medic corp.

Since she’s a member of the medic corp, and Shinobu is a pharmacist, I’m guessing Kanao’s pink blade has some sort of drug-like property.


The Hashira are probably the top demon slayers in the demon slayer corp. I’m assuming they’re all members of the Kinoe rank — the top rank. However, I think they’re probably not the only ones who hold that rank. If they were, there would be no reason to have the separate title of Hashira.

As for what Hashira means, it simply translates to “pillar.” Essentially, these are the pillars of the demon slayers corp. They’re the strongest members who uphold everything the corps stands for. But all we really know about them for sure is that there are at least seven of them.

Giyuu and Shinobu have already been confirmed as members of the Hashira, and five other members are pictured with Shinobu in the image below. And I say there are “at least” seven members because since Giyuu wasn’t pictured with them perhaps there are others who also simply weren’t pictured.

The Hashira from the anime series Demon Slayer: Kimetsu no Yaiba
The Hashira

It’s also possible that there are only seven and Giyuu isn’t with them because he’s been imprisoned for defending a demon. My guess is that the Hashira are going to be the ones who determine Nezuko’s fate, with Shinobu arguing for her death and Giyuu arguing for her life.

Also, since there are so few Hashira, and the two we know the most about use different breathing techniques, it makes sense to me that they all have different specialties. There’s probably a Hashira for the Thunder Breathing and Beast Breathing techniques, along with three other techniques we don’t know yet.

Taking a look at the picture of them lined up, I think the central man will be the Thunder Hashira and the one on the far right will be the Beast Hashira. So let’s just make some guesses for the other three Hashira pictured.

My guesses are as follows: the man on the left is the Earth Hashira, the woman on the left (not Shinobu) is the Sky Hashira, and the woman on the right is the Plant Hashira. Also, now that I look at this cape, perhaps the main in the middle is actually the Fire Hashira and the man on the left is the Thunder Hashira.


What did you think about this week’s episode of Demon Slayer: Kimetsu no Yaiba? Did you like Rui’s origin story? Do you think Kanao is trying to steal Shinobu’s distinction as best girl? And what are your guesses for the techniques used by the Hashira pictured? Let me know in the comments.

If you enjoyed this review, remember to click the like button ❤ down below and follow me over on Twitter @DoubleSama so you don’t miss out on any new content. There’s also a Discord server anyone can join — especially those who know JavaScript because I’m working on a new bot in there.

Finally, I’d like to thank HeavyROMAN for supporting at the Heika tier this month. To learn more about how you too can become a supporter of this blog, check out

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Dr. Stone Episode 8

Dr. Stone Episode 8

Stone Road

Alright, so I think this episode’s title is supposed to referenced the antibiotic roadmap Senku drew, because there was no other sort of road present in the episode. But even though I figured that out, it’s still a terrible episode title that doesn’t really make sense.

Also before I actually begin the episode review I want to point out that Senku said “10 billion” five times in this episode alone.

Although I’d say the previous episode was really the start of the new arc in Dr. Stone, this episode adds the first sub-goal into the mix. We already knew that Senku wants to take over the stone village so that he can fight against Tsukasa, but now he also wants to do it to learn more about the world in which he’s in.

It’s revealed that Ruri, the sickly priestess of the village, has knowledge from before the petrification event. She’s the one who told the other villagers about gorillas, though none of them have ever seen one, and she also knows about Momotaro, a Japanese children’s folktale character.

My assumption is that she knows about these things due to a tradition of passing down “history” orally. I’m guessing that’s why she’s the priestess. Each priestess probably passes down the story of humanity to the next, and over the generations the details have become lost.

But Senku doesn’t know this, so he needs to gain access to Ruri in order to ask her about how she came to hold this long lost information. And to do that, he needs to create an antibiotic in the hopes that it will cure her illness.

There are two ways to create antibiotics, one resulting in penicillin and one resulting in sulfa drugs.

Antibiotic Roadmap

Senku chooses the sulfa drugs route because although it will take a lot of work, it’s the guaranteed way to make an antibiotic. Making penicillin relies on chance — at least in the stone world which doesn’t have any modern technology.

So let’s break down the roadmap Senku devises to create sulfa drugs from scratch. There are five ingredients necessary to create the final product. These are:

  • Chlorosulfuric Acid
  • Ammonia
  • Aniline
  • Sodium Bicarbonate
  • Acetic Anhydride
Senku's antibiotic roadmap from the anime series Dr. Stone
Senku’s antibiotic roadmap

The easiest of these final ingredients to acquire is ammonia, which is found in urine. The next easiest is acetic anhydride. To get this, alcohol must be turned into vinegar, and then the vinegar can be turned into acetic anhydride. The third ingredient is aniline, which is derived from coal.

The other two end ingredients are a bit more complex to create and all require sodium hydroxide. The first step to creating that is to acquire iron, which we saw Senku & friends fail to do in this episode. With iron they can make powerful magnets, which when combined with copper and phosphorus can make electricity.

To get sodium hydroxide, electricity and salt are needed. Once they have sodium hydroxide, they can go back and create carbonic acid from alcohol and fuse it with the sodium hydroxide to get sodium bicarbonate.

Finally, by combining the sodium hydroxide and sulfuric acid, sodium hydrogen sulfate is created. Salt and sulfuric acid can also be combined to get hydrochloric acid. When sodium hydrogen sulfate and hydrochloric acid are combined, chlorosulfuric acid is made — the final ingredient.

Detective Watermelon

A new character is introduced in this episode who helps Senku, Kohaku, and Chrome as they work toward making the antibiotics. Her name is Suika, which means watermelon. And why is this her name? Because she wears a watermelon rind on her head.

It’s not explained why she does this, but it’s implied that it’s because she doesn’t like the way she looks. Suika also understands that the other villagers don’t like her because of her unique headgear, and yet she seems not to realize that it’s something she can take off.

She says, “I can never make myself useful to anyone because I have this thing on my head.” It’s too bad therapists don’t seem to exist in the stone world, because I think Suika needs to see one. She clearly has some sort of social development disorder which should be worked out.

But, Suika does still have her uses. For one, she’s an extra body to help with manual labor. Sure, she probably won’t be doing any heavy lifting, but there’s still a lot of other work to be done so every additional set of hands helps.

She’s also the perfect person to perform reconnaissance missions. Somehow — I don’t really understand it — she can disguise herself as a watermelon thanks to her headgear. Either she somehow fits her whole body inside it, or she buries her body so only her head is showing. This wasn’t exactly made clear.

Stone World Ramen

So how does Suika’s detective work come into play? Is she going to be sent to spy on Tsukasa’s village? Not quite. Instead, she’s tasked with infiltrating the stone village and learning what the villagers want. With this information, Senku can win them over to his side and start up his nation of science.

The first piece of information Suika relays to Senku is that there are three sisters, Garnet, Ruby, and Sapphire, who all want a boyfriend. Unfortunately, Senku is married to science and doesn’t have time for beautiful women, so he can’t help with this request.

However, she also has some good information. It turns out that multiple villagers want more food — specifically food that isn’t the grilled fish they normally eat. This is a problem that can be solved with science.

Senku's stone world ramen from the anime series Dr. Stone
Senku’s stone world ramen

By using foxtail millet as his grain, Senku makes ramen for the stone villagers. He admits that it doesn’t taste all that great because he was improvising with the recipe, but it’s still better than anything the villagers have had before.

With this “invention” he plans to win the stone villagers over so that he can use their manpower to continue making the antibiotic for Ruri. Then, once she’s all better, he’ll be considered the savior of the village and hailed as a hero, not an evil overlord who came to conquer them.


Overall I don’t actually think this episode was all that bad, which is strange considering the fact that Senku said his catchphrase five times. Also, I don’t really like Suika and I view her as barely a character, but what do you think? Is Suika a good addition to the group? Let me know in the comments.

If you enjoyed this review, remember to click the like button ❤ down below and follow me over on Twitter @DoubleSama so you don’t miss out on any future content. There’s also a Discord server for anyone who’s interested in watching or discussing anime with other community members.

Finally, I’d like to thank HeavyROMAN for supporting at the Heika tier this month. To learn more about how you too can become a supporter of this blog and the benefits you’ll receive for doing so, check out

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Cop Craft Episode 7

Cop Craft Episode 7

Girls on Ice

I’m pretty sure this new arc of Cop Craft is unrelated to the hentai smuggling operation from the previous episode, but it does touch on some similar topics. Specifically, I’ll be discussing how both adult content and photography play a role in this week’s episode as well.

Last week we learned that hentai is a highly sought after commodity beyond the Greater Gate, but why exactly is that? Is it solely due to the fact that Semanians don’t have photography in their world, or is there more to it? Could it also have something to do with Semanian culture?

In this episode we see Tilarna infiltrate a Semanian brothel and pose as a prostitute. She does this as part of a sting on the business, but she also ends up catching a high profile, Semanian politician as well.

However, my question is this, is there a reason we only see Semanians involved? Does this brothel solely employ Semanian girls and is its target audience solely Semanian men? Or was it a coincidence that we only saw Semanians involved?

Based on what we’ve learned from Tilarna — the fact that she doesn’t seem to know anything about sex — it’s easy to assume that it’s a fairly taboo subject in her home world. Perhaps the Semanians view Earth as a place where they can break the taboos of their home world and are therefore more willing to partake in things like hentai smuggling, brothels, and other crime.

Tilarna herself is a knight, so perhaps her world is a highly structured one with a more utilitarian outlook. Perhaps it’s ruled by a religious organization of some sort. Or maybe it’s just more conservative in it’s view of sexuality than our own.

Mr. Mozeleemay

The politician who got caught up in the sting operation is Mr. Mozeleemay, a Semanian man who’s currently running for the mayor’s office. He has a wife, but it doesn’t seem like they have any children of their own.

Mrs. Mozeleemay is an interesting woman. She clearly knows that her husband hasn’t been faithful to her, and she doesn’t attempt to hide her disdain. However, she’s not about to let her way of life be destroyed just because her husband got caught up in this situation.

As we learn later on, it’s Mrs. Mozeleemay who puts out a hit on the person blackmailing her husband with evidence about the crime he committed. She seems to be the true power holder in their relationship, but she exerts this power from the shadows and for her own gain.

But back to Mr. Mozeleemay, the fact that he’s running for mayor is a pretty big deal. I’d imagine that it would be difficult to run for an office of any kind on Earth as a Semanian, especially considering there seems to have been a war between the two worlds not that long ago.

Did he take part in that war? Or did he and his wife come to Earth after peace had already been achieved? And how large is the Semanian population in the city in which he’s running? I’d imagine there would be many humans who still don’t want a Semanian to hold an office of any kind purely due to their own racist ideologies.

Whether you love him or hate him, you have to give Mr. Mozeleemay credit for his achievements in what we can assume is a difficult field for any Semanian to break into.

Zoey, Daily Life Photographer

One of the women Tilarna meets while infiltrating the Semanian brothel is Zoey, a prostitute who happens to be a daily life photography hobbyist. Zoey represents the other side of how the technology of photography can influence Semanians.

She’s not interested in how photography can be used to make hentai for sexual gratification, but instead sees it as an art form in and of itself. Her photographs are exclusively daily life shots, meaning she takes pictures of real people doing real things in their natural environments — such as a man sweeping the street in front of his shop.

Zoey taking a picture of Tilarna from the anime series Cop Craft
Zoey taking a picture of Tilarna

After the sting operation, Zoey was arrested and later released on bail. In return for a reduced bail, she agreed to wear a tracking bracelet, though this fact never actually turns out to be important. I assume it was just to keep her from running, not to keep tabs on her every movement around the city.

During her time out on bail she befriends Tilarna, who she believes is a girl from a rich family who ran away from home, not a cop. As the two grow closer, she confides in her that her dream is to open an exhibition hall to showcase her photography to the world.

It’s too bad Zoey had to go and blackmail Mr. Mozeleemay, because otherwise her dream may have come true. I imagine her work would be widely popular if she opened her exhibition back in her home world.

Cops & Criminals

The police learn that Zoey had been accessing the client records while she worked at the brothel. She then sold these records to Mr. Mozeleemay so that he could leak them to the public in an attempt to have his case thrown out by mixing in false names.

If some of the names on the client list turned out to be fake, then who’s to say his name wasn’t also falsely put on the list? This would have been a major blow to the investigation. So, as her friend, Tilarna decides to be the one to confront Zoey about the information she was selling.

Unfortunately, Zoey doesn’t take kindly to being lied to about who Tilarna really was. But that doesn’t matter for long, because an assassin shoots her from a building across the street. Zoey dies from the injuries she sustained.

Zoey getting shot next to Tilarna from the anime series Cop Craft
Zoey getting shot next to Tilarna

So why does Zoey’s story matter? Because it’s clearly going to have an impact on how Tilarna views the world. At the start of the series Tilarna’s view on justice was fairly black and white. If you were a criminal, then your rights are void and you must be a terrible person.

However, she’s changed over the course of the series. Tilarna from episode 1 would never have viewed a prostitute like Zoey as someone she could befriend. She would have seen her as a criminal, not someone she has anything in common with.

What Tilarna learned from her brief friendship with Zoey is that good and evil isn’t as black and white as she once thought. There can be truly good people who do bad things. But at the same time there are still truly evil people out there, such as those responsible for Zoey’s death.


What are your thoughts on this episode of Cop Craft? I thought it was actually really good, though I didn’t expect Zoey to be gone so soon. I figured she would join the police force and put her photography skills to work as a crime scene photographer.

If you enjoyed this review, remember to click the like button ❤ down below and follow me over on Twitter @DoubleSama so you don’t miss out on future content. There’s also an official Discord server if you’re interested in discussing and watching anime with myself and other community members.

Finally, I’d like to thank HeavyROMAN for supporting at the Heika tier this month. To learn more about how you too can become a supporter of this blog, check out

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Demon Slayer Episode 20

Demon Slayer Episode 20

Pretend Family

Last week I questioned whether or not the spider demon clan were truly related by blood. This week we got an answer to that question, and the answer is no — sort of. They aren’t actually related by blood, but they do have a special bond forged by blood which I’ll get to in a bit.

The Spider Silk Demon was building a “family” of demons to surround himself with for one reason. He thought that if he could truly feel the bonds of a family that it would help him remember his life as a human. But the question remains, why?

What does he get out of remembering his life as a human? And why did he forget it in the first place? Do all demons tend to forget their lives as humans? Has he been a demon for so long that he forgot? And, is remembering his human memories something Kibutsuji would want him to do?

I don’t really see what benefit would come from remembering his human past. If anything, it would make him no longer want to be a demon, which could prompt him to take his own life. This seems like something Kibutsuji wouldn’t want one of the Twelve Demon Moons to do, so why does he allow it?

There are two scenarios I can think of. The first is that Kibutsuji simply doesn’t know what the Spider Silk Demon is after, but this seems unlikely. The second is that Kibutsuji knows that even if he does feel the bonds of a family, it won’t make him remember.

Perhaps Kibutsuji allows him to indulge in this search for familial bonds so that he’ll remain loyal while knowing he’ll never find the answers he seeks.

Demon Blood Ritual

I’m glad we got to see the ritual which the Spider Silk Demon used to add new demons to his family. I had been wondering why all these demons looked similar and had spider-like abilities if they weren’t actually related in some way, and we now have the answer.

It doesn’t seem like the Spider Silk Demon can turn humans into demons with his blood, but he can alter those who are already demons. By drinking a mixture containing his blood, they develop their signature Blood Demon Arts and begin a physical transformation to look similar to him.

The Onee-chan Demon from the anime series Demon Slayer: Kimetsu no Yaiba
The Onee-chan Demon

So is this how Blood Demon Arts are acquired? Do certain demons have the ability to pass along Blood Demon Arts to others? It seems this is one possible way, but with Nezuko it seems this wasn’t the case. Nezuko’s Blood Demon Art seems to stem from her bond with Tanjirou.

Anyway, once the demons have undergone the ritual, the transformation doesn’t appear to be permanent. One of the things the Spider Silk Demon hates the most is when the other demons in his family allow their appearances to revert. I can only assume because it “breaks the illusion.”

But, what does this mean for their powers? If, for example, the Onee-chan Demon allowed her appearance to fully revert back to its original state, would she lose her Blood Demon Art too? And do these demons need to continuously undergo the ritual to stay in these forms?

Giyuu Tomioka

Let’s move on from discussing the demons to discussing the demon hunters. Giyuu Tomioka is the man who initially confronted Tanjirou and Nezuko at the start of the series, and is the one who sent a letter of introduction to Sakonji Urokodaki on their behalf.

Since then, we haven’t actually seen all that much of him. He’s been shown in a few scenes, but until the previous episode he was never really doing anything. So, although we’re bound to learn more about him in the future, let’s go over what we know so far.

Giyuu Tomioka from the anime series Demon Slayer: Kimetsu no Yaiba
Giyuu Tomioka

We know Giyuu uses the Water Breathing Technique like Tanjirou and Sakonji, but he seems to be better at it than both of them. I assumed he was Sakonji’s student at one point due to his use of this technique, but I’m starting to think that isn’t the case. He may just be someone else who uses it.

And the reason I say he’s better than both of them is that he actually knows more forms of it than they do — or at least than Tanjirou does. Sakonji only taught Tanjirou 10 forms of Water Breathing, but Giyuu knows an 11th, Dead Calm.

I don’t know how exactly this technique works because we don’t see him do anything, but it’s represented by a calm body of water without any ripples. I like to think that this is the final form of Water Breathing that comes with a complete mastery of the rest.

Shinobu Kochou

The other high-level demon slayer featured in this episode is Shinobu Kochou. You may recall seeing a girl with a similar butterfly hair clip at the end of the Final Selection, but these are two different characters. Perhaps that girl is a student of Shinobu or is related to her in some way.

Also, Shinobu is the best girl of the series. Sorry, Nezuko fans. I’m not really into girls who don’t talk and sit inside a box all day.

Everything about Shinobu is based on insects, butterflies in particular. Her hair clip is a butterfly, her robe looks like butterfly wings, and her sword has a butterfly-shaped tsuba (hand guard). The shape of her sword could also be seen as proboscis-like, which fits her overall theme.

Shinobu Kochou from the anime series Demon Slayer: Kimetsu no Yaiba
Shinobu Kochou

But what about her abilities? For one, it appears that she can either fly or glide in some way thanks to the wings of her robe. I’m not exactly sure how she does this, but it may have something to do with her Insect Breathing Technique. I’m also assuming this is the same breathing technique used by that girl at the Final Selection.

This is the perfect technique for Shinobu. Rather than relying on physical strength, something she doesn’t have, it relies on a flurry of smaller slashes. She even admits that she’s unable to decapitate demons, but she still manages to make the most of her technique.

Her blade works like a hypodermic needle and injects a poison into her opponents with every slice. It’s unclear exactly what goes into this poisonous cocktail, but at the very least we know it includes wisteria extract, which is deadly to demons.


What did you think of this week’s episode of Demon Slayer: Kimetsu no Yaiba? I, for one, think this was a great way to end the spider demon arc — at least I assume it’s over. This arc was definitely the best of the series so far, and I’m looking forward to what else this series has in store for us.

If you enjoyed this review, remember to click the like button ❤ down below. Also follow me over on Twitter @DoubleSama so you don’t miss out on any future content, and come join us in discussing anime over on Discord.

Finally I’d like to thank HeavyROMAN for supporting at the Heika tier this month. To learn more about how you too can support this blog, check out

My review of the next episode is available here.

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Dr. Stone Episode 7

Dr. Stone Episode 7

Where Two Million Years Have Gone

After watching this week’s episode of Dr. Stone I thought that there wasn’t going to be much for me to write about. But the more I thought about it, the more I realized that this episode actually has a lot of content to discuss. I hope your ready, because today’s review is all about anthropology.

Let’s start with the title of the episode, “Where Two Million Years Have Gone.” This could be referring to two different events which took place roughly 2 million years ago. Either it’s the rise of Homo as a genus or it’s the so-called Dawn of Technology.

Honestly, they both could work, and although 2 million years ago isn’t the best approximation of either event, it’s close enough. The Dawn of Technology was more like 2.6 million years ago, and the rise of Homo as a genus is anywhere from like 1.8 – 2.4 million years ago. I tend to go with 1.8, but whatever.

Senku and Kohaku riding on a cart from the anime series Dr. Stone
Senku and Kohaku riding on a cart

Regardless of which of these events the title is referring to, it has the same general point: the technological advancements of humanity (or Homo) have been lost. I mentioned last week how strange it would be if humanity really lost all the knowledge from before the petrification event, but we’re given more evidence for it this week.

For example, Kohaku doesn’t appear to know what wheels are. Wheels (and axles) are one of the six “simple machines” along with pulleys, which we saw last week, according to Renaissance scientists. Pulleys I can understand the stone people not knowing about, but wheels is hard to believe.

I can believe that nobody in “generation 0” (the generation which first awoke from being petrified) built a pulley system. But what I can’t believe is that none of them would have made a wheel. Surely someone in generation 0 built some sort of wheeled cart and someone from generation 1 saw it.

Stone Village

Alright, so the stone people don’t have wheels or pulleys. Do you know what they do have? A suspension bridge. That’s a far more advanced piece of technology than an axle with wheels. Though, to be fair, the inventors of the suspension bridge did not use wheels.

Still, I think it’s fair to assume that the bridge which connects the stone people’s island village to the mainland was originally constructed by generation 0, not someone from a later generation. So again, why didn’t they “invent” a wheel too? It would certainly have made their lives easier.

Moving on from the wheel, the bridge connecting the village to the mainland is actually extremely important. For starters, it means the stone people can live on the island, which should be relatively safe from wild animals, like the lions that still shouldn’t be roaming Japan.

It also means there’s only one entrance and exit to and from the village. This is both a blessing and a curse. On one hand, it means they can easily defend against wild animals, or people, because they only have one avenue into the village. On the other, someone like Tsukasa could burn it down and starve out the villagers.

Maybe Senku will introduce them to the drawbridge and they’ll build one on either side of the island.

As far as weaponry goes, knives, swords, spears, and shields seem to be the extent. We haven’t seen anyone with a bow or javelin, so it’s likely that the stone people posses no long-range weaponry. This is something that would make defending their island much easier.

At leas they seem to have sufficient shelter and sources of food. We can assume they haven’t begun farming, but scavenging, hunting, and possibly fishing considering they live on the water give them plenty of options.

Stone Villagers

Kohaku tells us that aside from the elderly and children, there are 40 stone villagers. And from those who we’ve seen, we can assume that Kohaku is at least a 3rd generation stone-worlder. We know she’s young, we can assume her parents aren’t too old, and we’ve seen some who look like they could be her grandparents.

I’m also assuming that none of the elderly are from generation 0 because then some of the customs of this civilization would really make no sense. After all, they seem to worship natural deities and refer to fairly basic science as sorcery. Anyone from generation 0 would know better.

So let’s take a look at some of the villagers of the stone village. Obviously we have Kohaku, so I’ll be skipping over her. But, Kohaku does have an older sister, Ruri, who’s a pretty important person. She’s the village priestess, and potentially the chieftain. However, Ruri is sickly, though we don’t yet know exactly what her ailment is.

Ruri’s personal guards are Jasper and Turquoise. You may notice that everyone in the stone village aside from Kohaku and Ruri are named after either metals or precious stones. We don’t yet know much else about these two.

The village guards are Kinro and Ginro, named after gold and silver respectively. Kinro is a stickler for the rules and is vehemently against allowing outsiders like Senku into the village. Ginro on the other hand, while not passive, is far more wary of things he doesn’t understand.

Also, this rule against outsiders is important. The stone villagers believe that there are no other humans in the outside world who aren’t somehow related to their village. Any outsiders are assumed to be the descendants of criminals who were once banished from their village. This means they don’t know people can become unpetrified.

Chrome the Sorcerer

The final stone villager, Chrome, gets his own section. He’s a self-proclaimed sorcerer, but what that really means is that he’s a scientist. While other villagers are doing things like foraging for food or honing their combat skills, Chrome is spending his time performing experiments with the various minerals and plants he finds.

The other villagers don’t seem to like this about him, and probably see him as a slacker, but someone has to be inventing new technology. Also, potentially related to the fact that the other villagers don’t trust him is the fact that his workshop is outside the village on the mainland.

Chrome the sorcerer from the anime series Dr. Stone
Chrome the sorcerer

After Senku defeats him in a “sorcerer battle,” Chrome reveals that there are two reasons he partakes in science. The first is because this is just what he feels is natural for him to do. He likes to collect things, mash them together, and see what happens.

However, the second reason is that he wants to develop a cure for Ruri’s illness. Like I said earlier, we don’t know what Ruri’s illness is, so coming up with a cure could be difficult. However, Senku decides that an antibiotic will probably do the trick, and he’s probably right considering how many things that helps with.

Now that Taiju is gone, it seems like Chrome is going to be Senku’s new right-hand man. And I have to admit that Chrome and Kohaku are already better supporting characters than Taiju and Yuzuriha ever were. They don’t just blindly follow Senku, and they seem like they’ll end up being more than one-dimensional characters.


What are your thoughts on this week’s episode of Dr. Stone? Are you interested in learning more about the stone village, it’s inhabitants, and their way of life? Or are you just looking forward to the eventual fight against Tsukasa? Also, if you were a stone villager, what metal or stone would you be named after? Let me know in the comments.

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My review of the next episode is available here.

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