Hikaru no Go

"Hikaru no Go" is a Japanese manga about a school boy named Hikaru Shindo who becomes a professional Go player in Japan. He gets interested in Go by mysteriously getting in contact with Fujiwara-no-Sai, the spirit of a very strong Go player who lived hundreds of years ago.

There is also an animated series based on the manga. I found it very enjoyable, too.

I found Hikaru no Go fascinating in several ways:

The popularity of Hikaru no Go resulted in quite some boom in Go's popularity among children, not only in Japan but also worldwide. See this short video documentary on this topic.