This is a list of minor characters featured in the fourth part of JoJo's Bizarre Adventure, Diamond is Unbreakable.
Most characters in this section have very little information to warrant a character page, usually due to lack of relevance or backstory.
(Note: Blue buttons link to separate pages)
Diamond is Unbreakable
Anime Debut: Diamond is Unbreakable Episode 6: Koichi Hirose (Echoes)
Namesake: The Police (English rock band)
As the Hirose family already has Police, Koichi isn't allowed to have another pet and has to take him for walks. He is seen sleeping at the beginning of Tamami Kobayashi's and Yukako Yamagishi's fights and is taken for a walk during Yuya's fight.
Anime Debut: Diamond is Unbreakable Episode 7: Toshikazu Hazamada (Surface) (Mentioned only)
Voice Actor: Yūko Iida (Drama CD)
Anime Debut: Diamond is Unbreakable Episode 8: Yukako Yamagishi Falls in Love, Part 1 (Photo only)
Anime Debut: Diamond is Unbreakable Episode 9: Yukako Yamagishi Falls in Love, Part 2
Voice Actor: Tarō Kiuchi (Japanese), Lucien Dodge (English)
Anime Debut: Diamond is Unbreakable Episode 10: Let's Go Eat Some Italian Food
It is only named in the TV drama.
Anime Debut: Diamond is Unbreakable Episode 11: Red Hot Chili Pepper, Part 1
Anime Debut: Diamond is Unbreakable Episode 1: Jotaro Kujo! Meets Josuke Higashikata
The Yamakura (山倉) residence sought by Lady Murakami may also be in the ghost alley since it is not on Morioh's map.
Anime Debut: Diamond is Unbreakable Episode 17: Rohan Kishibe's Adventure (Mentioned only)
Film Debut: Diamond is Unbreakable - Chapter 1 (Mentioned only)
Takashi was 45 years old and Kazuko was 39 years old when they died. They were only given names and ages in the anime, which the live-action film also uses.
Anime Debut: Diamond is Unbreakable Episode 18: Shigechi's Harvest, Part 1 (Mentioned only)
Anime Debut: Diamond is Unbreakable Episode 19: Shigechi's Harvest, Part 2
Voice Actor: Isamu Yusen (Japanese), Richard Epcar (English)
Anime Debut: Diamond is Unbreakable Episode 29: Highway Star, Part 2
Voice Actor: Tarō Kiuchi (Japanese), Stefan Martello (English)
Seemingly nervous, Yoshioka agrees but his phone is stolen by Josuke immediately. Unaware of what just happened, he continues talking to his hand before he notices his phone is gone, and is then anguished over the loss of one billion yen and his job. As Josuke grabbed the phone too hard, it ended up breaking.
Anime Debut: Diamond is Unbreakable Episode 29: Highway Star, Part 2
Voice Actor: Mutsuki Iwanaka (Japanese), Matthew Mercer (English)
Anime Debut: Diamond is Unbreakable Episode 29: Highway Star, Part 2
Anime Debut: Diamond is Unbreakable Episode 30: Cats Love Yoshikage Kira
Anime Debut: Diamond is Unbreakable Episode 34: July 15th (Thursday), Part 4 (Mentioned only)
Anime Debut: Diamond is Unbreakable Episode 38: Crazy Diamond Is Unbreakable, Part 2 (Mentioned only)
Anime/Film Characters
Voice Actor: Bucky Koba (Japanese), David Vincent (English)
Later, he and Hirata are by a fountain when Aqua Necklace attacks Hirata by entering his mouth and rupturing his internal organs. Aqua Necklace then enters Masaya's body and takes control of him, causing him to become a robber of a convenience store. He takes a woman hostage but Josuke punches a hole through the both of them with Crazy Diamond. The two are both immediately healed, but Crazy Diamond also infused Masaya's knife into his stomach. Aqua Necklace exits his body as Anjuro has no use for him anymore.
Later, he and Masaya are by a fountain when Aqua Necklace attacks Hirata by entering his mouth and rupturing his internal organs, killing him.