Hikaru No Go is a great Japanese manga. It's the story of an elementary school boy who discovers an ancient Go board inhabited by the spirit of an expert Go player from Japan's feudal past.
The comic deftly tells stories that combine the pressures of being a young kid, the nuances of the game of Go, and anime-style epic battles. It makes playing Go seem incredibly cool. The art is awesome: see some samples here.
The English editions (published by Shonen Jump) are well done. My eight year old nephew just devoured one in a day. Amazon makes it difficult to find them. Here's a list of the English editions: Hikaru No Go Vol 1, Vol 2, Vol 3, Vol 4.