Izumi Kobayashi (小林泉美) is a Japanese professional Go player at Nihon Ki-in since 1995. She is known for holding many female titles in the 2000s.
Izumi Kobayashi has several professional players in her family.
|Minoru Kitani, 9-dan professional go player|
|Koichi Kobayashi, 9-dan professional go player|
Holder of three honorary titles
Former female title holder
|Cho U, 9-dan professional player|
- Grandfather: Minoru Kitani, 9-dan professional go player
- Father: Koichi Kobayashi, 9-dan professional go player, holder of three honorary titles
- Husband: Cho U, 9-dan professional player from Taiwan
| Women's Honinbo (女流本因坊)
| Women's Meijin (Women's Grand Master, 女流名人)
||2001, 2003, 2004
| Women's Kisei (Women's Board Master, 女流棋聖)
| Women's Champion (女流最強位)
||Received the female player MVP (棋道賞女流賞)
||1st place in the female player prize money ranking.
||Obtained 200 career wins (Youngest and fastest female player to obtain this status)
||Qualified to the main tournament of the 10 dan title (6th female player to obtain this status)
||Received the Journalist Club Award with her husband. She was also qualified to the main tournament of the 10 dan title.
||She became the first player to obtain all major female titles. She also obtained 300 career wins in this year (Youngest and fastest female player to obtain this status).
||Victory at the Daiwa Securities Internet Go Ladies.
She has wrote introductory Go books which were published by the NHK publishing.
- 「小林泉美のやさしい19路盤の打ち方」(How to simply play in a 1919 board)