Masaki Nishizawa (born February 22, 1972) is a Japanese mixed martial artist. He competed in the Flyweight and Bantamweight divisions.
|- | Loss | align=center| 1-3-2 | Masahiro Oishi | TKO (punches) | | | align=center| 1 | align=center| 4:12 | Tokyo, Japan | |- | Win | align=center| 1-2-2 | Norio Nishiyama | Decision (unanimous) | | | align=center| 2 | align=center| 5:00 | Setagaya, Tokyo, Japan | |- | Draw | align=center| 0-2-2 | Daiji Takahashi | Draw | | | align=center| 2 | align=center| 5:00 | Setagaya, Tokyo, Japan | |- | Loss | align=center| 0-2-1 | Shuichiro Katsumura | Decision (unanimous) | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Loss | align=center| 0-1-1 | Masaru Gokita | Decision (unanimous) | | | align=center| 2 | align=center| 5:00 | Tokyo, Japan | |- | Draw | align=center| 0-0-1 | Hiroaki Yoshioka | Draw | | | align=center| 2 | align=center| 5:00 | Setagaya, Tokyo, Japan |