- Also Known As: Kato Kensei.
- Born on 3/15/1947 and died on 12/30/2004.
- In 1964, became 1 dan pro.
- In 1978, became 9 dan pro.
- On 4/4/1959, became the student of Kitani Minoru 9p.
- In 1976, won Japan 1st Gosei Title and 14th Judan title.
- In 1977, successfully defended his both titles, and also won 32th Honinbo Title.
- In 1979, won five titles, Honinbo, Judan, Oza, Kakusei and Tengen.
- In 1982, won Japan 7th Tengen title.
- In 1986, won Japan 11th Mejin title.
- In 1987, won four titles, Judan, Gosei, Meijin and Oza.
- In 1988, won NHK Cup champion.
- In 1989, won Oza title for 8 consecutive times.
- In 1991, 1992 and 1997, won NEC Cup champion.
- In 1993, won 11th Oza title.
- In 1995, won Kakusei title for 2 consecutive times.
- In 1997, won 7th Judan title.
- In 1998 and 2001, won 7th and 10th Ryusei champions.
- In 2002, won 57th Honinbo title again after 23 years since he won the title last time and won 36th KIDO Most Outstanding Player Award.
- In 2003, won Agon Cup champion for the third time.
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