|Born:||March 31 1936|
Sandayu Dokumamushi is a Japanese actor. He portrayed Daisuke Arashi in Ultraman and Shigeru Furuhashi in Ultraseven. He has been a radio personality on the Tokyo Broadcasting System (TBS) from October 6, 1969 to the present. His radio program is famous for vulgar language and is popular with an older audience.  He is nicknamed Mom-chan (まむちゃん Mamu-chan), Viper (まむし Mamushi), Mr. Viper ( まむしさんMamushi-san ).
- Ultraman: Daisuke Arashi
- Ultraseven: Shigeru Furuhashi
- Captain Furuhashi (Heisei Ultra Seven - Solar Energy Strategy, The Ground of the Earthlings)