| Kazuhiro Koso 高祖 和弘 | |
| Fullname: | Kazuhiro Koso |
| Birth Date: | 6 March 1959 |
| Birth Place: | Saga, Saga, Japan |
| Position: | Goalkeeper |
| Youthyears1: | 1974–1976 |
| Youthclubs1: | Saga Higashi High School |
| Youthyears2: | 1977–1980 |
| Youthclubs2: | Tenri University |
| Years1: | 1981–1991 |
| Clubs1: | Matsushita Electric |
| Manageryears1: | 2000–2001 |
| Managerclubs1: | Sagan Tosu |
is a former Japanese football player and manager.
Koso was born in Saga on March 6, 1959. After graduating from Tenri University, he joined Matsushita Electric (later Gamba Osaka) in 1981. He retired in 1991.
In 1990, when Koso was a player, he became goalkeeper coach at Matsushita Electric. He coached until 1997. In 2000, he signed as manager with his local club Sagan Tosu and became a manager. He managed until 2001.