日本沈没

小林桂樹

Dr. Tadokoro

藤岡弘、

Onodera Toshio

いしだあゆみ

Abe Reiko

丹波哲郎

Prime Minister Yamamoto

島田正吾

Old man Watari

John Fujioka

Narita

Andrew Hughes

Australian Prime Minister

Franz Gruber

United Nations Committee member

中村伸郎

Japanese Ambassador

中島春雄

Prime Minister's Chauffeur

二谷英明

Dr. Nakata

夏八木勲

Yuki

滝田裕介

Assistant Professor Yukinaga

田中友幸

Government official (uncredited)