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ジョジョの奇妙な冒険 Part4 ダイヤモンドは砕けない 文庫版 [Jojo no Kimyō na Bōken Part 4: Diamond wa Kudakenai bunkoban] #2
Jojo's Bizarre Adventure Part IV: Diamond is Unbreakable, vol. 2
Josuke, aún herido por el ataque de Bad Company, consigue vencer a Keicho Nijimura. Después intenta destruir el arco y la flecha capaces de conceder Stands, pero alguien los ataca y se lleva ambos artefactos. Más tarde, un hombre que se convirtió en portador de Stand gracias al arco y la flecha se presenta ante Koichi.
288 pages, Paperback
First published January 1, 1993
55 people are currently reading
485 people want to read
About the author
Hirohiko Araki
650 books2,035 followersHirohiko Araki ( 荒木飛呂彦) is a Japanese manga artist. He left school before graduation from Miyagi University of Education.
He enjoys the baseball manga Kyojin No Hoshii (Star of the Giants); the video games Mario Kart and Bomberman; and likes Prince and other African-American singers, as well as jazz, rock, and rap.
He is a recipient the Tezuka Award for manga.
He enjoys the baseball manga Kyojin No Hoshii (Star of the Giants); the video games Mario Kart and Bomberman; and likes Prince and other African-American singers, as well as jazz, rock, and rap.
He is a recipient the Tezuka Award for manga.
Ratings & Reviews
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Community Reviews
Displaying 1 - 30 of 66 reviews
November 26, 2020
This volume has a stronger focus on Koichi than the first one as two of the three storylines feature him as the main character. It was a nice change of pace as Koichi is a more relatable character than Josuke. As for the villains, there is an interesting variety of powers presented. Araki always amazes me with his creativity when coming up with powers for his characters.
November 5, 2024
Another good edition to the jojo series. This volume had the introduction of Yukako. Which was enjoyable to read. Honestly Yukako and Koichi storyline was entertaining and I’ll miss this arc. I love the clever Prince reference the author includes in the book. Onto volume three
April 14, 2021
i love how this was more based around koichi :) made me like him even more 🥲
January 13, 2025
I forget how clinically insane every enemy stand user is in this part. They have no big overarching motive, just truly in it for the love of the game. Like Tamami is just out here ruining peoples lives for a check, Hazamada is literally just an incel with too much power, and Yukako is genuinely crazy. Everything here felt incredibly unserious especially with Okuyasu. A very Koichi focused volume, but still fun.
October 29, 2025
Goated as per usual with JJBA 😏 ⭐
Story ⭐⭐⭐⭐
Characters ⭐⭐⭐⭐⭐
Scene/World building ⭐⭐⭐⭐⭐
Overall ⭐⭐⭐⭐⭐
Story ⭐⭐⭐⭐
Characters ⭐⭐⭐⭐⭐
Scene/World building ⭐⭐⭐⭐⭐
Overall ⭐⭐⭐⭐⭐
June 13, 2022
i hate koichi so much 2.5 stars
September 16, 2025
This Part is even weirder and bizarre than the other three that came before it. But I really like the “Stands in Suburbia” vibe going on. It’s slightly smaller scale, but more mysterious in tone. Koichi is the best character so far!
January 10, 2023
very bizarre, in this one they fight a crazy girlfriend with hair issues
(also it’s more focused on koichi - best character)
(also it’s more focused on koichi - best character)
May 14, 2025
Big fan of Yukako. Love when women are batshit crazy
August 12, 2019
Yowie wowie. This part is taking the cake for me by far. I loved Stardust, but Diamond is so clever, and funny, and just as creative without all the weird cultural stereotypes. Sure, nothing here is brewing as infamously as Jotaro vs Dio, but Morioh is a bonkers, fantastic setting, and the way Araki invents lore around the stands is so much fun, I can't help but smile. I hope there's a BIG plotline in here somewhere, but honestly, I'd take these weird adventures for what they are if I had to, it's a whole hell of a lot of fun.
April 17, 2025
Koichi is a belter
January 20, 2025
- koichi feels like the underdog who will come into his powers slowly, but that stand is strong in its own weird way
- is there's some reason that the bully guy suddenly appears smaller/shorter? is it an indication that he's no longer intimidating or am i reading too much into it?
- koichi finds himself in a hairy situation. (pun intended)
- it's just a random observation, but koichi reminds me of yogi moto from yu-gi-oh, like the sweet appearance before his transformation and the changes in his hair
- woohoo! it's a digivolution!
- is there's some reason that the bully guy suddenly appears smaller/shorter? is it an indication that he's no longer intimidating or am i reading too much into it?
- koichi finds himself in a hairy situation. (pun intended)
- it's just a random observation, but koichi reminds me of yogi moto from yu-gi-oh, like the sweet appearance before his transformation and the changes in his hair
- woohoo! it's a digivolution!
August 23, 2025
3.25 Stars
Koichi!!! What the first volume lacked, this issue makes up for in spades with way more focus on my son Koichi! I love him so much and he gets some much needed time to shine in these chapters, despite the arcs themselves being somewhat mediocre at best…
Tamami’s stand ability is actually really unique and continues to establish Araki’s creative freedom that the concept of stands has given him. The Lock seems like it would be more at home in one of JoJo’s later parts where a lot of the stands have very specific abilities and functionalities and I also can’t help but feel like it’s potential is completely wasted here. The concept of a stand that works off of the weight of your sins is terrifying and could be used to explore some really interesting character aspects in the narrative of part 7 for example and yet it’s unfortunately given to a very much not intimidating conman. The saving grace of this arc is for sure Koichi. This arc does a nice job of setting up his character as a gentle, somewhat naive guy but someone who can show some real backbone and determination when his back is against the wall or his friends and loved ones are being threatened, something we see more of in the final arc of this volume. Echoes has such a great design especially this version of echoes, it gives me big Imperfect Cell vibes from dragonball. The design also just suits Koichi so well, they’re both just little guys after all!!
One thing I do wanna highlight is Tamami’s design. At the beginning of the arc Tamami is a big guy, far taller than Koichi and has a much larger stature than him too, but as the fight unfolds and Koichi gains the upper hand, Tamami becomes smaller and smaller. It’s just a fun little thing Araki plays around with, the same can be seen with Hazamada in the next arc. It’s something that’s not present in the anime unfortunately as I think it’s a really fun concept.
I don’t have much to say about the fight against Hazamada’s Surface as personally I’ve always found it really boring. Possibly my least favourite arc in this part tied with the rock paper scissors kid unfortunately. But what I can say is the panelling and art is really fantastic here Araki was really cooking.
While I’m not particularly fond of the first two arcs, this volume is saved by the final arc for me. Any Koichi focused arc is gonna be enjoyable to me at the very least and it helps that the setup for this one is genuinely hilarious. Between Okuyasu crashing out over never being shown interest by a girl before, Koichi being so bashful and not knowing how to act in such a situation and Yukako just being batshit crazy this arc just works for me. It’s super silly and you can really see Araki getting comfortable with playing around with the dynamics of our main cast. The personalities of Josuke, Okuyasu and Koichi in particular are such opposites and yet they work so well when they’re together as a trio, I love this cast so much they really feel like besties. This arc is great for establishing just how cunning Koichi and Josuke are. Koichi has to use his stand in really unique ways to figure out how to escape from Yukako’s grasp and it really adds to the intrigue of the arc. For such a simple premise, it really keeps you on your toes you never know what’s going to happen next. Something I’ve always liked about JoJo’s that I think differentiates it from a lot of even modern battle shounens is that the characters find their own solutions and ways out of situations. It’s very rare that another character will suddenly appear and save the day for them, it’s never so convenient. Koichi has to figure out his own solutions to Yukako’s ability and have I mentioned how I absolutely adore how sassy little Koichi gets whenever his back is to the wall?
Koichi!!! What the first volume lacked, this issue makes up for in spades with way more focus on my son Koichi! I love him so much and he gets some much needed time to shine in these chapters, despite the arcs themselves being somewhat mediocre at best…
Tamami’s stand ability is actually really unique and continues to establish Araki’s creative freedom that the concept of stands has given him. The Lock seems like it would be more at home in one of JoJo’s later parts where a lot of the stands have very specific abilities and functionalities and I also can’t help but feel like it’s potential is completely wasted here. The concept of a stand that works off of the weight of your sins is terrifying and could be used to explore some really interesting character aspects in the narrative of part 7 for example and yet it’s unfortunately given to a very much not intimidating conman. The saving grace of this arc is for sure Koichi. This arc does a nice job of setting up his character as a gentle, somewhat naive guy but someone who can show some real backbone and determination when his back is against the wall or his friends and loved ones are being threatened, something we see more of in the final arc of this volume. Echoes has such a great design especially this version of echoes, it gives me big Imperfect Cell vibes from dragonball. The design also just suits Koichi so well, they’re both just little guys after all!!
One thing I do wanna highlight is Tamami’s design. At the beginning of the arc Tamami is a big guy, far taller than Koichi and has a much larger stature than him too, but as the fight unfolds and Koichi gains the upper hand, Tamami becomes smaller and smaller. It’s just a fun little thing Araki plays around with, the same can be seen with Hazamada in the next arc. It’s something that’s not present in the anime unfortunately as I think it’s a really fun concept.
I don’t have much to say about the fight against Hazamada’s Surface as personally I’ve always found it really boring. Possibly my least favourite arc in this part tied with the rock paper scissors kid unfortunately. But what I can say is the panelling and art is really fantastic here Araki was really cooking.
While I’m not particularly fond of the first two arcs, this volume is saved by the final arc for me. Any Koichi focused arc is gonna be enjoyable to me at the very least and it helps that the setup for this one is genuinely hilarious. Between Okuyasu crashing out over never being shown interest by a girl before, Koichi being so bashful and not knowing how to act in such a situation and Yukako just being batshit crazy this arc just works for me. It’s super silly and you can really see Araki getting comfortable with playing around with the dynamics of our main cast. The personalities of Josuke, Okuyasu and Koichi in particular are such opposites and yet they work so well when they’re together as a trio, I love this cast so much they really feel like besties. This arc is great for establishing just how cunning Koichi and Josuke are. Koichi has to use his stand in really unique ways to figure out how to escape from Yukako’s grasp and it really adds to the intrigue of the arc. For such a simple premise, it really keeps you on your toes you never know what’s going to happen next. Something I’ve always liked about JoJo’s that I think differentiates it from a lot of even modern battle shounens is that the characters find their own solutions and ways out of situations. It’s very rare that another character will suddenly appear and save the day for them, it’s never so convenient. Koichi has to figure out his own solutions to Yukako’s ability and have I mentioned how I absolutely adore how sassy little Koichi gets whenever his back is to the wall?
August 4, 2025
“Ain’t broke, don’t fix it” continuation of the Stand-of-the-week storytelling of new Jojo. The small town murder mystery is building about as slowly as the P3 cast moved to Egypt. In the same way, though, these chapters did plenty to merit their inclusion.
Okuyasu becomes a dedicated member of the growing Joestar party, Josuke continues to be a bit more charming lead than Jotaro (still my GOATaro), and Koichi and his new Stand, Reverb, get a lot of screen time.
My interpretation of Jojo is that while it’s slowly lurching forward with the bow and arrow storyline, it lets itself settle very comfortably into an episodic action/adventure with… slice of life elements? When Koichi is fighting Tamami, the ugly little freak with the padlock of guilt Stand, it doesn’t feel like it’s a part of the overall story. All it really does is give us a first look at Koichi’s stand, and leave us with a single panel exploring the concept of intermingled fate of Stand users. Not a huge payoff for 5 chapters… but it was a fun ride nonetheless. Koichi had his moments, there were some funny lines, and it pushed things just a smidge in the right direction. I’m learning to like the pacing a lot more than racing to the finish line.
The Copy Stand is sick, Josuke vs Josuke was a blast while it lasted. Wish we had more of that one honestly. Finally, Yukako and Koichi’s horror movie romance was a great deal of fun too. Her Stand was lame and felt very Silver Age comics, but it was full of humor and those patently Jojo “what am I reading” moments. Enjoyed.
Better see some more fisticuffs next vol though. Dorarara!
Okuyasu becomes a dedicated member of the growing Joestar party, Josuke continues to be a bit more charming lead than Jotaro (still my GOATaro), and Koichi and his new Stand, Reverb, get a lot of screen time.
My interpretation of Jojo is that while it’s slowly lurching forward with the bow and arrow storyline, it lets itself settle very comfortably into an episodic action/adventure with… slice of life elements? When Koichi is fighting Tamami, the ugly little freak with the padlock of guilt Stand, it doesn’t feel like it’s a part of the overall story. All it really does is give us a first look at Koichi’s stand, and leave us with a single panel exploring the concept of intermingled fate of Stand users. Not a huge payoff for 5 chapters… but it was a fun ride nonetheless. Koichi had his moments, there were some funny lines, and it pushed things just a smidge in the right direction. I’m learning to like the pacing a lot more than racing to the finish line.
The Copy Stand is sick, Josuke vs Josuke was a blast while it lasted. Wish we had more of that one honestly. Finally, Yukako and Koichi’s horror movie romance was a great deal of fun too. Her Stand was lame and felt very Silver Age comics, but it was full of humor and those patently Jojo “what am I reading” moments. Enjoyed.
Better see some more fisticuffs next vol though. Dorarara!
November 21, 2022
I found this volume to be quite a step down for the first in Part 4 which is saying something because volume 1 completely ripped off a Stephen King short story.
This volume mainly follows Koichi as he learns to use his Stand. I did like hoe the Stand had already evolved by the end of the volume in a way that we haven't seen before but I didn't really like the story with the girl who was obsessed with him. It felt all kinds of weird to me and not in a good way.
The first set of chapter follow Koichi as he goes up against a Stand user for the first time in this case Tamami. I liked the idea of Tamami's stand and could see how it would be almost undefeatable but I really did not like Tamami's character and he gets even worse when the next set of chapters starts (don't want to spoil anything).
The second set of chapters involved a Stand called Show Off which had a really interesting idea. A Stand that could duplicate a person using a wooden artists doll as a base. There was so much you could have done with this but it just seemed to get wasted. In Part 3 of Jojo we saw defeated Stands coming back time and time again so maybe we'll get to see more of Show Off later on the series but it looked pretty final to me.
All in all a bit of a let down but the Part is still finding it's feet and thee are still seven more volumes for it to get better and better (fingers crossed).
2022 Goals – #MangaMonday wk47
This volume mainly follows Koichi as he learns to use his Stand. I did like hoe the Stand had already evolved by the end of the volume in a way that we haven't seen before but I didn't really like the story with the girl who was obsessed with him. It felt all kinds of weird to me and not in a good way.
The first set of chapter follow Koichi as he goes up against a Stand user for the first time in this case Tamami. I liked the idea of Tamami's stand and could see how it would be almost undefeatable but I really did not like Tamami's character and he gets even worse when the next set of chapters starts (don't want to spoil anything).
The second set of chapters involved a Stand called Show Off which had a really interesting idea. A Stand that could duplicate a person using a wooden artists doll as a base. There was so much you could have done with this but it just seemed to get wasted. In Part 3 of Jojo we saw defeated Stands coming back time and time again so maybe we'll get to see more of Show Off later on the series but it looked pretty final to me.
All in all a bit of a let down but the Part is still finding it's feet and thee are still seven more volumes for it to get better and better (fingers crossed).
2022 Goals – #MangaMonday wk47
December 9, 2021
Volume 2 of Jojo's Bizarre Adventure: Diamond is Unbreakable continues the story of Josuke Higashikata and the city of Morioh, Japan. I read this volume because I was immediately hooked on the introduction to this story and wanted to see what would happen next. The chapters in this volume really show how much stand battles have evolved since the last part. While in Part 3, many stand battles were fairly straightforward, the ones shown here have very unique abilities that still pose a genuine threat to our protagonists. Speaking of protagonists, this volume focuses more on Koichi Hirose than Josuke, a change that I liked because it made the main crew all feel equally as important, instead of the Jojo leading every fight. We also get to see Koichi's stand ability fully manifest into Echoes. And we see his ability evolve and change as he grows as a character which is a great way to demonstrate how dynamic he is. His stand starts as an egg, which represents how he hasn't reached his potential, but as he gets into more dangerous situations and gains more and more confidence, his growth as a character is reflected in his stand, which hatches and allows him to win the day. I once again loved this volume and would recommend it to people who have read the previous ones.
This entire review has been hidden because of spoilers.
December 31, 2022
Whelp, so much for that perfect 5 star run I said that Diamond might be able to hit in my review for volume 1. How could I have FORGOTTEN that this part has FUCKING. KOICHI. IN. IT. And boy was this ever THE Koichi volume, with 2 out of 3 fights focusing entirely on him while the only other one, while actually really good tbh, was about freak weirdo Hazamada. In terms of actual blandness though, it's really only the first fight with Tamami that's actually sorta boring, and I actually do find the Yukako arc really refreshing because of how it completely subverts the generic villain format and really doesn't even feel like a "fight" at all.
Overall, I'll admit that given this got 4 stars, Koichi is clearly not as unbearable to me as I find him in the anime, mostly because I can just glaze past him quicker... But I'm still not a fan. It's JOJOS bizarre adventures, not Koichi's bizarre adventures!
Quote of the Volume:
"No girl had ever confessed her love for me before..."
"I feel you, man. I sure do feel you. I feel you DEEPLY."
- Koichi Hirose and Okuyasu Nijimura
Overall, I'll admit that given this got 4 stars, Koichi is clearly not as unbearable to me as I find him in the anime, mostly because I can just glaze past him quicker... But I'm still not a fan. It's JOJOS bizarre adventures, not Koichi's bizarre adventures!
Quote of the Volume:
"No girl had ever confessed her love for me before..."
"I feel you, man. I sure do feel you. I feel you DEEPLY."
- Koichi Hirose and Okuyasu Nijimura
This entire review has been hidden because of spoilers.
March 23, 2020
Tomo dos de la cuarta saga de Jojo. El nuevo status me gusta y en este tomo podemos ver lo interesante que son los poderes nuevos. Koichi desarrolla su stand y aunque al principio parece débil, parece que con una buena estrategia de Jotaro o de Josuke podían explotar ese stand al máximo.
Mi parte favorita del tomo fue el enfrentamiento de Koichi contra Tamaki. Parece que este "villano" lo seguiremos viendo y que se unirá al equipo como pasó en las sagas anteriores. Tamaki no me gusta tanto como personaje pero veamos cómo se desarrolla su dinámica con Koichi.
El enfrentamiento de Josuke contra Surface me gustó bastante. Siempre son tensas estas batallas. Aunque de cierta manera sabes que Josuke triunfará, la manera en la que lo logra siempre es interesante y sorpresiva. El amigo que me recomendó este arco me dijo que esto seguirá aumentando en los siguientes volúmenes y que siempre se mantendrá impredecible y muy creativo.
Mi parte favorita del tomo fue el enfrentamiento de Koichi contra Tamaki. Parece que este "villano" lo seguiremos viendo y que se unirá al equipo como pasó en las sagas anteriores. Tamaki no me gusta tanto como personaje pero veamos cómo se desarrolla su dinámica con Koichi.
El enfrentamiento de Josuke contra Surface me gustó bastante. Siempre son tensas estas batallas. Aunque de cierta manera sabes que Josuke triunfará, la manera en la que lo logra siempre es interesante y sorpresiva. El amigo que me recomendó este arco me dijo que esto seguirá aumentando en los siguientes volúmenes y que siempre se mantendrá impredecible y muy creativo.
September 2, 2022
I really enjoyed reading the second volume. Something about starting another book that connects to an overall story is so rewarding. Something about the story told in this volume is so satisfying to me. I don't know why. I don't want to spoil anything though not much happened. I will say for the overall series I love the feeling; I love how as it goes on it gets more eerie, I love how the first few volumes are set up very happy and bright and as it goes on it gets scarier and scarier. I will never have a negative thing to say about this volume or this series.
July 15, 2020
A mysterious stand user threatens Jotaro to get out of town. Koichi meets a real jerk named Tamami, who tries to take all of his money and possessions. Koichi must defeat him alone, or his mom and sister Ayana lives are at stake if he makes a mistake. Josuke nearly kills Jotaro due to the stand, Show Off. A dangerous girl, Yukako falls for Koichi, but she's trouble. Yukako tries to kill Koichi for trying to leave her, a real hairy situation.
This entire review has been hidden because of spoilers.
February 16, 2021
Koichi nagyon jó karakterfejlődésen megy keresztül, és külön jó touch, hogy a érettségével változott Echoes evolúciója. Minél inkább elhatározza, hogy fellép Yukako ellen, annál fejlettebb lesz. Yukako is remek feloldozást kapott, rájött, hogy nem irányíthatja Koichit, de mégjobban belészeretett Koichibe, mivel megmentette az életét és bizonyította a rátermettségét. Remek karakterdesignok, mindenkinek megvan a saját stílusa, nem csak öltözködésben de a megrajzolás módjában is.
December 26, 2023
Another fantastic installment, Koichi’s the main highlight of this volume and his run in with crazy stalker / Stand user Yukako Yamagishi, although this volume has many other amazing moments, I think this is the highlight. Seeing Koichi get his moment and overall transform into a character who can hold his own is amazing to witness. I also love Echoes (Reverb) one of the best stands in my opinion.
(This is a reread)
(This is a reread)
This entire review has been hidden because of spoilers.
November 6, 2025
Personally i have been enjoying this series, this is the first volume where im like what the hell is goinf on and why is it taking so long. Sorry for the spoiler but did not need half a book about this girl with a hair stand and boring koichi. Im sorry but i think hes a lame character and i wish he was never part of it. Loved part three it felt like there was so much action and mystery but currently its not great.
This entire review has been hidden because of spoilers.
October 26, 2023
Now we’re starting to get into a good rhythm. The Lock and Surface are great fights that unfold very satisfyingly. Araki’s art is also getting better as he realizes a softer style would be better for this story. I will say, I’ve never been a fan of Yukako in general. She’s funny as a one time gag but I don’t really see much deeper with her character.
April 2, 2020
After watching the anime, it was nice to read the manga for the first time. Josuke was, and still is, my favourite of the Jojo protagonists. His stand is cool, and overall has a fun personality and quirky hair.
August 28, 2021
I really enjoyed this volume. I just can’t bring myself to like Koichi nearly as much as I like Josuke, so the fact that almost the entire second half of volume focused on his character was kinda lame. Alas, it’s still fun, and I’m excited to see where Diamond is Unbreakable goes from here!
November 11, 2023
Quand est-ce qu'un méchant arrête d'être un méchant ? Quand il nous raconte son histoire et que ça explique ses actes. Bravo pour faire des personnages qui ont plus d'une dimension. J'attends le vrai villain toutefois.
January 16, 2025
All Koichi this volume, a certified dude.
Characters and Stands:
Koichi Hirose + Reverb Act 1 and Act 2 🐉
Tamami Kobayashi + The Lock 🔒
Mrs Hirose, Koichi’s Mum 👩🏻
Ayana Hirose, Koichi’s Sister 👩🏻
Toshikazu Hazamada + Show Off 🖊️
Yukako Yamagishi (Ern) + Love Deluxe ❤️🔥
Characters and Stands:
Koichi Hirose + Reverb Act 1 and Act 2 🐉
Tamami Kobayashi + The Lock 🔒
Mrs Hirose, Koichi’s Mum 👩🏻
Ayana Hirose, Koichi’s Sister 👩🏻
Toshikazu Hazamada + Show Off 🖊️
Yukako Yamagishi (Ern) + Love Deluxe ❤️🔥
May 29, 2025
Watched Part 4 a month ago or so and now I'm finally getting to read the manga...vol. 2 came in first from the library so I'm starting here, which means I got to see the art style shift! Just as fun and funky as I remembered, and the color pages were so sick
July 9, 2025
This volume isn’t bad, these fights stress me out / aren’t my fav (Yukako’s especially 💀). I like the new characters introductions and Okuyasu’s involvement/developing friendship with the squad. 3.5 stars rounded up to 4 ⭐️
This entire review has been hidden because of spoilers.
Displaying 1 - 30 of 66 reviews