character - Yu's grandfather

character - Professor Karube

character - Professor Takashi Yabe

character - Researcher

character - Detective

character - Ichimatsu

character - Bodyguard

character - Tanaka Mitsuaki

character - Nakamura

character - Stadium guest B

character - Nakamura

character - Detective Tonami

character - Reporter A

character - Kiyomura Construction employee

character - Driver

character - Shigeo