Gen Tosa (Masao Daishin) boxer
- bouts
- 28
- won
- 17
- lost
- 10
- draw
- 1
- Status
- inactive
- Division
- super featherweight
- Debut
- 1978-11-23
- Height
- -
- Reach
- -
- Age
- -
- Born
- 1952-08-07
- Death
- -
- Nationality
- Japan
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1986-02-25 | Noboru Godai | WLWLWW | Korakuen Hall | LOST Points |
| 1985-10-14 | Yoshinari Tanaka | WWLWLW | Korakuen Hall | WIN Majority decision |
| 1985-05-23 | Yung-Soo Cho | LWLL | WIN Points |
|
| 1985-03-22 | Jin-Shik Choi | LWWWWW | Seoul | LOST Points |
| 1984-11-27 | Isaya Ikhoni | WLWWWW | Korakuen Hall | LOST Majority decision |
| 1984-08-22 | Kiyoshi Sasaki | LWWWWL | LOST Points |
|
| 1984-05-14 | Satsuma Maebara | WWWWLW | Korakuen Hall | WIN KO |
| 1984-01-18 | Takao Maruki | LWWWLW | Korakuen Hall | WIN Points |
| 1983-10-11 | Chiba Arredondo | WWLWWL | Korakuen Hall | LOST Technical knockout |
| 1983-07-28 | Fighter Matsukawa | LWDWLL | Korakuen Hall | WIN Unanimous decision |
| 1983-04-28 | Eijiro Kuruma | WWWWLW | Korakuen Hall | DRAW Points |
| 1982-09-30 | Spider Nemoto | WWWWLW | Korakuen Hall | LOST Points |
| 1982-06-06 | Min Keun Oh | WWLWWW | Changchung Gymnasium, Seoul | LOST Points |
| 1982-05-04 | Takashi Sengoku | WWWWWW | Korakuen Hall | WIN Points |
| 1981-12-17 | Eijiro Kuruma | DWWLWW | Osaka | LOST Points |
| 1981-11-26 | Fusao Imai | WWWWLL | WIN KO |
|
| 1981-09-24 | Kyung Soo Hong | WWWWLW | Korakuen Hall | LOST Points |
| 1981-03-29 | Freddie Mensah | LWLLWW | Prefectural Gymnasium, Osaka | LOST KO |
| 1981-02-03 | Kojiro Sasaki | LLLLDD | Korakuen Hall | WIN Points |
| 1980-07-31 | Gen Akutsu | WLDWLL | Korakuen Hall | WIN Unanimous decision |
| 1980-01-28 | Gen Akutsu | WWLDWL | WIN KO |
|
| 1979-12-09 | Tomio Nakamura | LLWWWL | Osaka | WIN Points |
| 1979-10-25 | Tomio Nakamura | WLLWWW | WIN Points |
|
| 1979-09-01 | Ken Sogo | WLLDLW | Tsuchiura | WIN KO |
| 1979-05-24 | Katsutoshi Takasaki | L | Korakuen Hall | WIN KO |
| 1979-03-27 | Takatoshi Honda | debut | WIN KO |
|
| 1979-02-11 | Young Hideo | WWWLL | WIN Points |
|
| 1978-11-23 | Keiki Tsushima | debut | Korakuen Hall | WIN Points |