Older brother to Yūhei Azuma, he was once a star pitcher and cleanup batter for Takao Jitsugyo High School.
He was on the verge of winning the regional finals to reach Kōshien, as well as being observed by pro team scouts, but was forced to quit baseball after sustaining a career-stopping leg injury while saving Yūhei from falling down a staircase. He runs a produce delivery service, and is currently acting as the batting coach for Seishū's baseball team. This is because Ichiyō, whom he is romantically involved with, has promised to marry him if Seishū makes it to Kōshien.
