After appearing in dramas such as "Red Bond" (TBS) and "People Call It Scandal" (TBS), Natsu has appeared in crime action television drama "Tokusou saizensen" (TV Asahi) as a detective Shunichi Kano since 1980. Regular appearance for 7 years until 1987. After that, he developed a . Although he disappeared from the front stage for a while due to symptoms such as facial nerve paralysis, Natsu overcame this and played an active role as an actor representative of "Gekidan Theater Japan". He died at a hospital in Tokyo on January 27, 2010 due to stomach cancer at the age of 59.