Moto Ôno
— Kei Kusumoto
小林節彦
— Seiichi Yanagihara / Kei's father
Natsuhiko Ueda
— Yuji Inoue, the tutor
Kiyomi Itō
— Sawako Kusumoto, Kei's mother
山本竜二
— Yakuza
Kensuke Suzuki
— Boy A
Kenichi Kôbe
— Man in the toilet
真央はじめ
— Yoshito Mao
Kiyoshi Nakayama
— Homeless man
Itaru Nakayama
— Kei (age 5)
Boyakkī Tanaka
— Train passenger
Ryūri Nose
— Young man in toilet