Segata Sanshiro is a character created by Sega to advertise the Sega Saturn in Japan between 1997 and 1998. He is a parody of Sugata Sanshirō, a legendary judo fighter from Akira Kurosawa's 1943 film Sanshiro Sugata. In television and radio advertisements, Segata Sanshiro is portrayed by actor Hiroshi Fujioka. He was positioned as a martial artist who commanded people to play Sega Saturn games.

The Sega Saturn is a home video game console developed by Sega and released on November 22, 1994, in Japan, May 11, 1995, in North America, and July 8, 1995, in Europe. Part of the fifth generation of video game consoles, it is the successor to the successful Genesis. The Saturn has a dual-CPU architecture and eight processors. Its games are in CD-ROM format, including several ports of arcade games and original games.