Okuyasu Nijimura

Okuyasu Nijimura is one of the main characters in Part IV: Diamond is Unbreakable. The character is introduced as an antagonist, but quickly becomes Josuke Higashikata's best friend.

Personality
Okuyasu is not the brightest character in the story, and tended to rely on his elder brother Keicho Nijimura to make difficult decisions. After Keicho's death, Okuyasu has been known to say that he is "not good at making decisions", and has managed to smoke out Akira Otoishi with luck when presented with a choice with punching either of the two Speedwagon Foundation employees.

Okuyasu is jealous of Koichi's relationship with Yukako Yamagishi, but only comically so and does not interfere in their relationship.

History
Okuyasu's father has mutated into a bizarre creature due to Dio's spores when Okuyasu was only 7. Searching with his brother Keicho Nijimura for a way to kill their father and put him out of his misery, the Nijimura brothers start using the Bow and Arrow in possession of Keicho to find a user capable of killing him.

Diamond is Unbreakable
In their search for a stand capable of killing their father, the Nijimura brothers end up shooting Koichi Hirose, giving him Echoes. This attracts Josuke Higashikata's attention and a fight ensues. Okuyasu, due to not being very bright, ends up causing his own defeat and even enters in the attack range of Bad Company. After explaining his story, Keicho is killed by the Stand Red Hot Chili Pepper, who steals the Bow and Arrow. Okuyasu sought revenge against its user, but almost died in the battle. He eventually managed to protect Joseph Joestar from the user Akira Otoishi, being responsible for his arrest.

During this time and the following events surrounding Yoshikage Kira, he became fast friends with Josuke, Shigekiyo Yangu and Koichi. He is affected by Tonio Trussardi's Pearl Jam Stand and enjoys his cooking. He rather dislikes Rohan Kishibe because of what Rohan tried to do to him in their fight, making Okuyasu burn himself while transformed in a living book for trying to save Koichi.

Okuyasu's value of friendship is the reason he became enraged when Shigechi was killed by Yoshikage Kira. In their search for Kira the group encountered his father Yoshihiro Kira, but Okuyasu couldn't help them because he was outside of Atom Heart Father's depicted area. Okuyasu also fought Toyohiro Kanedaichi, but was unable to hit him as a result of Super Fly reflecting his attacks. Eventually Okuyasu seemingly dies after suffering mortal wounds during a battle with Yoshikage Kira, only to return after meeting his brother in a dream. Keicho asks him where he wants to go and Okuyasu answers that he wants "to go back to Morioh" which results in him waking up. He appears at the end to say goodbye to Reimi Sugimoto, claiming that he will be lonely without her (just like Rohan).

The Book: 4th Another Day
(The information below derives from a Light Novel not written by Araki. As such, it may or may not be consideredcanon.)

Okuyasu helps in the investigation of Hanae Orikasa's death. He eventually comes across the killer Takuma Hasumi and chases him to the library, where they engage in battle. Okuyasu's experience and instincts turn out to be useful against the inexperienced stand user, causing serious injuries to him, but ends up being defeated. Nonetheless, Okuyasu contributes to Josuke's victory by telling him how the killer fights.

Rohan at the Louvre
Okuyasu makes a brief appearance, hearing Rohan's story about Nanase Kishibe along with Koichi and Josuke. Okuyasu tells Rohan he always reminded him of Mona Lisa and asked for him to imitate her pose for a photo. Rohan left to investigate Nizaemon Yamamura's painting without saying anything, making Okuyasu say he didn't mean to insult Rohan.

Stand
Okuyasu's stand, The Hand, is a reference to the Canadian country rock band, The Band. The reference to this group is a misheard pronunciation of how Japanese would use the "ha" or "ba" sound.

The lyrics to the song "The Night They Drove Old Dixie Down" give insight to Okuyasu and Keicho's natures, and the theme of the the Nijimura Brothers chapters.

Trivia

 * He enjoys a strawberry & chocolate chip ice cream on his way to school; it is the only thing that cheers him up on Monday mornings.
 * Okuyasu normally cannot handle any type of spicy food.
 * He frequently says that his "brain is not so good", a fact his brother and other characters mention often.
 * The 億 sign on his right sleeve is the "Oku", the kanji for 100,000,000.