Ichikawa
About
Ichikawa is a blind professional mahjong player with extremely acute hearing. Ichikawa is a player that would play by the book, while Akagi played in various ways, ignoring rationality.
He seems to be similar to Akagi, but Akagi denies this, calling him a fake, and proves it by defeating him.
He appears in Hero, a sequel to Ten.
(Source: Akagi Wiki)