Yohei Nanbu has seven losses against seven opponents on his MMA record. For a list of Nanbu's best fights, refer to "Best fights of Yohei Nanbu".
On March 28, 2004 Yohei Nanbu faced off against Hatsu Hioki at age 27. He was coming in with a record of 2-7-2 (0), and Hioki was 20 years old and with a record of 3-1 (3). Nanbu lost the fight via 2-round unanimous decision.
On November 3, 2003 Yohei Nanbu faced off against Akitoshi Tamura at age 26. He was coming in with a record of 2-6-2 (0), and Tamura was 23 years old and with a record of 2-2-1 (0). Nanbu lost the fight via 2-round unanimous decision.
On February 6, 2003 Yohei Nanbu faced off against Jin Kazeta at age 26. He was coming in with a record of 2-5-2 (0). Nanbu lost the fight via 1st-round TKO.
On March 15, 2002 Yohei Nanbu faced off against Makoto Ishikawa at age 25. He was coming in with a record of 2-4-2 (0), and Ishikawa was 27 years old and with a record of 6-4 (2). Nanbu lost the fight via 2-round majority decision.
On January 19, 2001 Yohei Nanbu faced off against Takaharu Murahama at age 24. He was coming in with a record of 2-3-2 (0), and Murahama was 28 years old and with a record of 3-3-4 (2). Nanbu lost the fight via 2-round unanimous decision.
On January 14, 2000 Yohei Nanbu faced off against Kohei Yasumi at age 23. He was coming in with a record of 2-2-1 (0), and Yasumi was 21 years old and with a record of 1-0-2 (0). Nanbu lost the fight via 2-round majority decision.
On January 27, 1999 Yohei Nanbu faced off against Kazuya Abe at age 22. He was coming in with a record of 0-1 (0). Nanbu lost the fight via 2-round unanimous decision.