|Portrayed by||Hiroshi Fujioka|
Segata Sanshiro (せがた三四郎 Segata Sanshirō) is a fictional 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 Sanshiro Sugata.
Sanshiro is a dan holder for multiple Japanese martial arts (karate and iaidou first dan, judo third dan, battoudou fourth dan, toudou 7th dan etc..). He is portrayed by actor Hiroshi Fujioka, who, until that point, was best known for playing the hero Takeshi Hongo in the influential tokusatsu superhero series Kamen Rider.
Sanshiro is a Judo master that tracks down and punishes those who do not play the Sega Saturn. His name sounds similar to the phrase "You must play the Sega Saturn!" (セガサターン、シロ! Sega Satān, shiro!) as well as "Sega Saturn, White" (セガサターン、白 Sega Satān, Shiro), a reference to the new white color version of the Japanese Sega Saturn which followed the original gray version.
Sanshiro lives as a hermit high on a mountain, devoting his life to intensive Sega Saturn training. He trains physically every day by carrying around a giant Sega Saturn on his back and punching buttons on its giant controller, as well as mentally by breaking stacks of blocks with his head. His intense training has resulted in his ability to make people explode twice by throwing them, which he does with ease. He also frequently visits the city to seek out people who are not playing the Sega Saturn, and harshly teaches them a lesson. Sanshiro is a serious man with a firm sense of duty, who believes that playing video games is one of the most treasured activities in life.
The character became very well known in Japan, and helped make the Saturn successful in that country. When the CD music single was released By Warner Music Group, it sold more than 100,000 copies.
When the Saturn was phased out and the Sega Dreamcast released, Sanshiro's end came in the form of a commercial involving a missile directed at the Tokyo headquarters of SEGA, launched by the two Console Wars competitors. Sanshiro heroically jumps off the roof of the building, onto the missile, deflecting it into the atmosphere while riding it, in which he lives his last few moments chanting out "Sega Saturn Shiro!!" for one last time, and is killed in the subsequent explosion. Shinji Nakae the narrator of the Hey! Spring of Trivia narrates that "Segata Sanshiro will live on in your hearts," followed by a display of the game Segata Sanshirō Shinken Yūgi, a Sega Saturn game in which Sanshiro plays a major role. However, many believe that he survived the explosion and lived on. At the end of the commercial, you can see a shooting star, or, Segata reentering the Earth's atmosphere.
Segata Sanshiro was present at the launch of the Dreamcast in Japan. He would later appear in Issue 269 of Sonic the Hedgehog from Archie Comics, in which he faced Sonic the Hedgehog in a fighting tournament inspired by the game Sonic the Fighters.
Sanshiro is referenced in the Japanese version of Virtua Fighter 4, in which one of the AI profiles for Akira Yuki is named Segata. This same profile name appears in the US version of Virtua Fighter 4 Evolution.
Segata Sanshiro also has an appearance in Rent A Hero No. 1, a Japanese game released on both the Dreamcast and Xbox. He serves as a martial arts instructor who can teach new moves to the main character.
Sanshiro is seen in Sonic & All-Stars Racing Transformed, riding the rocket from the commercial and carrying a giant Sega Saturn on his back. This, however, only occurs if the player is in the lead at the final lap of Race of Ages.
A character named Shiro appears in Planeptune in Hyperdimension Neptunia Mk2 and Hyperdimension Neptunia Victory, which is a reference to Segata Sanshiro. In Megadimension Neptunia VII, an ancient artifact called "Sanshiro's Soulful Patch" is also a reference to Segata Sanshiro. In the same game, Noire notes that Sanshiro is one of Planeptune's great men, referencing Segata's importance to Sega's legacy.
Sanshiro also appears in Project X Zone 2 as a solo unit (although he initially appears as a rival unit), making his first playable appearance and his source material outside Japan. In the game, his dialogue makes numerous references to the Segata Sanshiro Japanese television advertisements (including an acknowledgement of his relationship with Sakura Shinguji in his introductory episode) and Sega games. 
The Segata Sanshiro campaign is often cited as one of the major reasons for the success of the Sega Saturn in Japan. Nintendo Power journalist Steve Thomason singled out Sanshiro as the character he would most like to control in the Nintendo DSi game Photo Dojo. Thomason amended that "it's just a shame his greatest skill – throwing opponents to make them explode – couldn't be translated to the game."
- SEGATA SANSHIRO! Article
- Plunkett, Luke (July 22, 2011). "Segata Sanshiro, the Greatest Video Game Ad Man Of Them All". Kotaku. Retrieved November 25, 2015.
- "Project X Zone 2 Adds Resonance of Fate Characters, Segata Sanshiro, More". Anime News Network. September 9, 2015. Retrieved November 25, 2015.
- "Writers' Block: What Person or Character Would You Like to Photograph for Use in Photo Dojo?". Nintendo Power. No. 256. July 2010. p. 85.