Takao Yuki, the police detective

Kyûichi Ishii, the murderer

Yuji Shimooka, the police detective

Sadako Yokokawa

Mrs. Shimooka

Mr. Yokokawa

Mr. Yamada, principal offender

Mr. Takakura

Proprietress of the Hotel Hizen-ya

Yumiko Takakura

Mrs. Takakura

Saga Police Detective

Taxi driver

Policeman

Postman

Takakura's younger sister

Yokokawa's son

Yokokawa's son

Yu Tachibana's daughter

Laundry owner