Hiroshi Yamanaka is Kiyomaro's excessively sports-crazed friend. He believes he is in a constant competition with Kiyomaro when it comes to athletic competitions to establish a friendly rivalry with him. He has big dreams of playing in the major leagues one day in his future. He is first introduced in episode 3 after Kiyomaro foiled Reycom and Hosokawa's bank robbery, telling Kiyomaro that he "had guts".
(Source: Gash Bell Wiki)
