Japan Go Association (日本棋院 Nihon Ki-in) - The headquarters of the Japan Go Association is located in Tokyo, and many of the characters go to the building for Go matches and other events. it is the main organizational body for Go in Japan, overseeing Japan's professional system and issuing diplomas for amateur dan rankings. It is based in Tokyo. The other major Go association in Japan is Kansai Ki-in. Its innovations include the Oteai system of promotion, time limits in professional games, and the introduction of issuing diplomas to strong amateur players, to affirm their ranks.
- Hikaru Shindo
- Akira Toya