The Prime Minister Cup was a

Go competition This is a list of professional Go tournaments, for competitors in the board game of ''Go''. The tradition, initiated by the Honinbo Tournament in Japan, is for an event to be run annually, leading up to a title match and the award of a title f ...

Outline

The Prime Minister Cup ran from 1961 to 1981. It was used by the

Nihon Ki-in The Nihon Ki-in (), also known as the Japan Go Association, 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 associat ...

The first 18 titles were decided in a knockout tournament. The last two years, the format was changed to a best-of-three match between finalists from a large knockout.

Past Winners & Runner-up's

{{Japanese go titles Go competitions in Japan