Gender: Male

Age: 40

Height: 171 cm

Player-Data: No.10

Blood-Type: A

Occupation: Middle School Teacher

Hometown: Tokyo

Status:

BIM-Type: Cracker

Kill(s): 0

Isamu is first seen promoting a pacifistic approach. However, he is later shown to have mentally prepared himself to resort to violence, especially when Masashi baits him into reaching for BIM pouch by pulling out his own BIM; Masashi suggests this to be proof of Isamu's hyposcrisy.

He is also very opinionated. He is prideful of both his knowledge and his occupation as a teacher, occasionally exhibiting such behavior whenever lecturing his audience. Whenever his views are questioned, he becomes very sensitive, prompting him to justify that he either meets a qualification or that his reasons are moral.

He mentions little of himself other than his occupation as a teacher and his claim of having a sixth-dan in judo.