Shisho Yamahachi is the protagonist of the So You Want To Be a Samurai? game and comic. He is the son of Akira and Aliceshia Yamahachi, who are both members of a Japanese military rank known as Shinsamurai. Shisho himself is training to be a Shinsamurai under Akira and Aliceshia's master, Hitoto Hanzō.
The story begins with a teenaged Shisho in a sparring match with Hitoto. A shadowy villain killed Hitoto, and left his henchman Brash to contend with an enraged Shisho. Shisho killed Brash - his first actual fight as well as his first kill - and vowed to avenge Hitoto's death, taking his master's crystal necklace.
Years later, an older, grizzled Shisho appears in New York City, searching for clues leading to Hitoto's murderer.