Shinichiro Isumi (伊角 慎一郎 Isumi Shin'ichirō) is a character in Hikaru no Go.
In the Japanese version of the anime, his voice actor (seiyu) is Kenichi Suzumura.
Tamsin: His personal breakthrough, which happened while he was training in China prior to his second shot at the pro exam, was to realise that he could control his emotions while playing. He went on to qualify as a pro with straight wins, and not only that, but also beat the despicable Kuwabara in his Beginner Dan game. In his own words, controlling emotions was "a skill that he could master". (I am aware that he is only a fictional character, by the way!!!)