Hikaru No Go is a coming of age story based on the manga of the same title which is in turn based on on the board game Go. The same basic storyline is followed by the manga and anime, with a few small changes between the versions. While exploring his grandfather's shed, Hikaru stumbles across a Go board haunted by the spirit of Fujiwara-no-Sai, a fictional Go player from the Heian era. Sai wishes to play Go again, having not been able to since the late Edo period, when his ghost appeared to Honinbō Shūsaku, an actual Go player of that period. Sai's greatest desire is to attain the Kami-no-Itte – "Divine Move", or the "Hand of God" – a perfect game. Because Hikaru is apparently the only person who can perceive him, Sai inhabits a part of Hikaru's mind as a separate personality, coexisting, although not always comfortably, with the child.