Masao Ohba has two losses against two opponents on his boxing record. For a list of Ohba's best fights, refer to "Best fights of Masao Ohba".
On September 2, 1968 Masao Ohba faced off against Susumu Hanagata at age 18. He was coming in with a record of 16-2-1 (9). Ohba lost the fight via 10-round unanimous decision.
On June 16, 1967 Masao Ohba faced off against Masakazu Tani at age 17. He was coming in with a record of 6-1 (4). Ohba lost the fight via 4-round unanimous decision.