Keiichiro Yamamiya (born July 12, 1972) is a Japanese former professional mixed martial artist.

A veteran of 90 fights who began his career in 1996 and last competed in 2015, he fought in the UFC, Pancrase, DEEP, and World Victory Road.

Though Yamamiya was the heavy favorite on multiple media scoring websites, Hisamatsu won a majority decision.

[5] Yamamiya faced UFC veteran Keita Nakamura at DEEP: 67 Impact on June 22, 2014.

[6] He lost the fight via TKO (punches) in the first round, putting Yamamiya at four losses in a row.