- Born on 6/20/1977, she is the daughter of Kobayashi Koichi 9p and Kobayashi Reiko 6p, her grand-father is Kitani Minoru 9p and her husband is Cho U 9p.
- In 1995, became 1 dan pro.
- In 2004, became 6 dan pro.
- In 2001, won 20th Women Honinbo title.
- In 2002, won 21st Women Honinbo title and 36th KIDO Women Award.
- In 2003, won 15th Women Meijin title and 22nd Women Honinbo title and achieved three consecutive Honinbo titles.
- In 2004, successfully defended Women Meijin title and won 7th Women Saikyo champion.
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