Jun Koiwa (Hajime Iwata) boxer
- bouts
- 42
- won
- 26
- lost
- 8
- draw
- 8
- Status
- inactive
- Division
- lightweight
- Debut
- 1963-06-08
- Height
- -
- Reach
- -
- Age
- -
- Born
- 1944-01-31
- Death
- -
- Nationality
- Japan
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1970-04-01 | Hiroshi Shoji | LLWWWD | LOST KO |
|
| 1970-02-22 | Ricky Sawa | WWLWLL | DRAW Points |
|
| 1969-11-27 | Yoshiaki Numata | WWDDWL | Suizenji Gym, Kumamoto | LOST KO |
| 1969-10-02 | Hidemori Tsujimoto | DLWWWW | LOST KO |
|
| 1969-07-31 | Rokuro Ishiyama | WWWWWL | WIN Majority decision |
|
| 1969-04-24 | Yoshiaki Numata | WLWWWD | DRAW Points |
|
| 1968-11-11 | Hubert Kang | WLWWLW | Seoul | LOST KO |
| 1968-08-10 | Shoji Nakagawa | LWLLLL | City Gymnasium, Ishioka | WIN Points |
| 1968-03-21 | Yoshiaki Numata | WWWWWL | LOST Unanimous decision |
|
| 1968-02-26 | Takao Mitsuhashi | WDLLLW | WIN Points |
|
| 1968-01-10 | Toshiharu Mori | DWWWWL | Nagoya | LOST Points |
| 1967-11-16 | Norio Endo | LWWLWW | Kokugikan | WIN Points |
| 1967-08-10 | Norio Endo | WWWLWW | Korakuen Hall | WIN Points |
| 1967-04-03 | Noriyuki Matsuo | WLLLLD | Okayama City | WIN Points |
| 1967-03-02 | Kuwashi Shimizu | WWWWWL | WIN KO |
|
| 1967-01-09 | Tetsuo Nakayama | DWLLWW | Utsunomiya | DRAW |
| 1966-12-19 | Kiyoshi Kira | debut | WIN Points |
|
| 1966-06-19 | Shoji Nakagawa | WLLLWW | WIN Points |
|
| 1966-02-06 | Ikko Toratani | LWLLLL | WIN Points |
|
| 1966-01-10 | Hitoaki Izumi | LLDL | WIN Points |
|
| 1965-11-07 | Ikko Toratani | DLWLLL | WIN Corner retirement |
|
| 1965-10-24 | Noboru Kanemoto | LL | WIN Points |
|
| 1965-09-09 | Kikuo Ishida | debut | WIN Points |
|
| 1965-07-08 | Takao Mitsuhashi | WWLLWW | LOST Points |
|
| 1965-05-24 | Hiroshi Shoji | WWWLWD | DRAW Points |
|
| 1965-04-26 | Tsutomu Nikawa | D | WIN Points |
|
| 1965-03-21 | Noboru Yamashita | LL | WIN Corner retirement |
|
| 1965-03-04 | Tatsunao Mitsuyama | LWDLDW | WIN Points |
|
| 1964-12-17 | Sadao Takagi | LDDWWL | WIN Points |
|
| 1964-08-15 | Nobuo Chiba | WWWWDW | DRAW Points |
|
| 1964-06-25 | Nobuo Chiba | WWWWWW | DRAW Points |
|
| 1964-06-02 | Kazuyoshi Ohashi | L | Riki Sports Palace | DRAW Points |
| 1964-03-31 | Akio Hirayama | debut | WIN Points |
|
| 1964-02-25 | Hiroshi Hidaka | WL | DRAW Points |
|
| 1964-01-18 | Akitoshi Ishii | L | Riki Sports Palace | WIN Points |
| 1963-12-25 | Yasuharu Uchida | debut | Riki Sports Palace | WIN Points |
| 1963-11-19 | Keizo Hamada | debut | Osaka | WIN KO |
| 1963-10-21 | Shigeru Suzuki | debut | LOST Points |
|
| 1963-09-24 | Masao Yonenaga | debut | Riki Sports Palace | WIN Points |
| 1963-08-27 | Akira Oyama | debut | Riki Sports Palace | WIN KO |
| 1963-07-30 | Kazuo Taya | debut | WIN KO |
|
| 1963-06-08 | Haruhiko Ikezawa | debut | Riki Sports Palace | WIN Technical knockout |
