The Honinbo tournament is the oldest and the most prestigious in Japan. It is sponsored by the Mainichi Newspaper, the champion prize is 32 million Japanese Yen (about US$ 303 thousands).
After a complex preliminary, eight players enter into league and they play each other once and the winner becomes the challenger. Time limits are 5 hours each except in the final, where each players has 8 hours.
Honinbo tournament is a place for creating records of consecutive titles, in its sixty years' history, total four players won Honorary Honinbo.
achieved 9 consecutive titles,
achieved 7 consecutive titles,
achieved 5 consecutive titles, and
9p owned the record of 10 consecutive titles and he won Honinbo titles for a total of 12 times.