The Japanese Belly Button

Mako Midori

Helen Amatsu / Momoe / Junko

Akihiro Miwa

Business man / Yakuza / Assistant professor

Hajime Hana

Dry cleaning shop owner / Lorry driver / Lighting man

Osami Nabe

Professor / Funayama

Gajirō Satō

Hattori / Pianist

Daigo Kusano

Judge / Yaneura / Comedian

Noboru Mitani

Railway assistant / Takada / Comedian

Hōsei Komatsu

Right wing / Ishii, the strip theatre owner

Terumi Azuma

Ex-singer / Tome / Stripper

Kazuo Kumakura

Helen's father

Michihiro Yamanishi