十八歳

Moto Ôno

Kei Kusumoto

伊藤清美

Sawako Kusumoto, Kei's mother

山本竜二

Yakuza

真央はじめ

Yoshito Mao

小林節彦

Seiichi Yanagihara / Kei's father

Natsuhiko Ueda

Yuji Inoue, the tutor

Kensuke Suzuki

Boy A

Kenichi Kôbe

Man in the toilet

Kiyoshi Nakayama

Homeless man

Itaru Nakayama

Kei (age 5)

Boyakkī Tanaka

Train passenger

Ryūri Nose

Young man in toilet