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Kimihiro Tsutsui (筒井公宏 Tsutsui Kimihiro) is a founder of the Haze Middle School's Go club.
Kimihiro has black hair and glasses
Go Middle School Tournament Arc
Internet Go Arc
Hokuto Cup Arc
Kimihiro has great skills in yose, but besides it, he is rather a average player.
- The name Kimihiro means "public, prince, official, governmental" (公) (kimi) and "wide, large" (宏) (hiro).
- Kimihiro's surname Tsutsui means "cylinder" (筒) (tsutsu) and "well, mine shaft, pit" (井) (i).