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Appearing behind Josuke
Toshikazu Hazamada (間田 敏和) is a minor character in Diamond Is Unbreakable, featuring as an antagonist in Toshikazu Hazamada (Surface) and in a supporting role in Let's Go Play at the Mangaka's House.
Opportunistically targeting Josuke with his new Stand, Toshikazu later befriends Koichi Hirose; appearing among the group agreed to watch for the killer terrorizing Morioh.
A teenage male, Toshikazu is initially tall, but later in the story, like Tamami, he shrinks to Koichi's height. In the anime, he is simply depicted as already being short in stature.
He has long, straight dark hair and wears a school uniform with several belts of varying lengths- mirroring a strait jacket.
Toshikazu seems quiet and timid. Although fellow students, like Josuke are initially unaware of him. He holds a hatred of popular people; even jealously attacking his own Stand once it adopts Josuke's appearance. He also displays a very strong passion for things he enjoys, such as his favorite manga series. If these things are insulted in the slightest way or even if someone doesn't particularly like it, Toshikazu becomes incredibly violent; even forcing another student to stab his eye out with a mechanical pencil for not liking a manga Toshikazu favored.
Heaven's Door exposes an even more sordid personality. He has abused small animals, enjoys secretly handling his genitals in class, and once planned to rape Junko, a senior female schoolmate. Thus, Rohan judges him despicable, and that no one would want to read a story about such a character.[2]
Toshikazu's Stand is Surface, able to copy any individual's appearance almost exactly, and in certain circumstances to dictate their movement.
Knowing that Koichi Hirose and Josuke Higashikata were searching for Stand users, Tamami told them about Toshikazu's incident with his friend, suspecting it to be caused by a Stand.
After searching the school, Josuke decides to break open Toshikazu's locker. Inside he finds a strange wooden doll, whom turns out to be Toshikazu's Stand, Surface. After the Stand copies Josuke's image and renders him unable to move, Toshikazu appears from behind some lockers and explains that he wishes for Jotaro to leave town. Josuke tries to attack Surface, but is unable to do so with his Stand range. Surface forces Josuke to elbow Koichi and then stab himself in the eye with a pen. Assuming he had knocked Josuke unconscious, Toshikazu and Surface, still disguised as Josuke, make their way to meet up with Jotaro. They meet Tamami and Surface fools him, making Tamami think that's Josuke, and knocks him out with a brick.
After calling Jotaro to meet up with them at the train station, the disguised Surface is greeted by many school girls, which angers Toshikazu. He attempts to punch his own Stand, but realizes that it is made of wood, and ends up hurting himself. Surface rebukes Toshikazu for his actions since he has seemed to have taken Josuke's personality.
Toshikazu wipes the blood from his hand upon a nearby motorcycle. The owner of the motorcycle finds the smudge on his car however, and begins to insult Toshikazu. Surface comes from behind and knocks out the Motorcycle owner's friend and then grabs the owner from behind. Toshikazu pulls out a scalpel and attempts to cut the man from the inside of his mouth, but is stopped when broken glass is thrown at him. Surface catches the glass and realizes that it was thrown by Josuke. Josuke is able to reform the broken glass back into a bottle removing Surface's right hand in the process. This allows Josuke and Koichi to run up ahead to meet Jotaro.
Josuke and Koichi arrive at Jotaro first, but Surface manages to take control of Josuke again. However, before he is able to attack Jotaro, the motorcycle owner and his friend from before appear, healed and instructed by Josuke to where Toshikazu was. They drag Toshikazu off, beating him to the point of hospitalization. Josuke, having broken free of Surface's ability, destroys the wooden doll.
In the hospital Josuke and Jotaro question him about Akira Otoishi, but Toshikazu denies knowing anything, but they will surely encounter him because Stand users are destined to meet each other due to Toshikazu's belief that every Stand user is destined to meet one another by a thin line of fate.
The two end up sneaking into Rohan's desk to see his drawings, but are affected by his Stand Heaven's Door. Toshikazu has his personality read, but Rohan comes to the conclusion that he is unsuitable for his work and leaves him alone.
Toshikazu appears again after Shigekiyo Yangu's death, being warned about Yoshikage Kira.
Unlike the others, Toshikazu privately hopes never to encounter Kira instead of offering his vigilance.
At the end of the series, Toshikazu comes to say goodbye to Reimi Sugimoto.
"Stand users, for one reason or another, are drawn to each other. As soulmates are "bound by fate", Stand users are bound to meet."
– Chapter 294
Appearing behind Josuke
Toshikazu dancing in Crazy Noisy Bizarre Town.