|Real name||Tadashi Mihara|
|Rated at||Light middleweight|
|Height||5 ft 10 in (1.78 m)|
March 30, 1955 |
Takasaki, Gunma, Japan
|Wins by KO||15|
Mihara began his boxing career when he was a third grader of the high school. He won the title of the All-Japan Amateur Boxing Championships in the light middleweight division in 1977. He also got the group title of the university league as a captain of the Nihon University boxing club. He experienced 38 matches during his amateur career; winning 28 (15 by knockout) and losing 10.
After that as the professional, Mihara fought 25 times between 1978 and 1985; winning 24 (15 by knockout) and losing 1. He won his first title in his fifth contest as a professional, beating Jae-Keum Lim for the OPBF title, a belt that he defended six times until he returned it. In June 1981, he won via a fifth round knockout, in the undercard of Ayub Kalule vs. Sugar Ray Leonard, at the Reliant Astrodome, Houston. Since Leonard vacated the title after this, Mihara fought against Rocky Fratto for the vacant WBA world junior middleweight title in Rochester, New York on November 7, 1981. Mihara knocked him down by his right cross in the fourth round, and won the title via a majority decision. He lost his title after suffering a knockout during his first defence, against Davey Moore at the Tokyo Metropolitan Gymnasium on February 2, 1982. His lumbago became chronic from these days. Following this loss, Mihara won the Japanese junior middleweight title and defended it six times until June 1984, then returned it. He fought for a final time in March 1985, beating Tricky Kawaguchi by a unanimous decision.
- Naoki Fukuda (January 15, 2000). "三原正〜本場・米国で名を刻んだエリート〜". In Boxing Magazine editorial department. The Glorious Moments 究極の栄光・世界チャンピオン名鑑 – 日本ボクシング史に輝く41人の男たち. B.B.mook; 117, sports series; No.72 (in Japanese). Tokyo, Japan: Baseball Magazine Sha Co., Ltd. pp. 56–57. ISBN 978-4-583-61076-4.
- Japan Pro Boxing Association, ed. (June 1, 2008). "世界王者アーカイヴス (World Champion Archives)" (in Japanese). Tokyo, Japan: Japan Pro Boxing Association. Retrieved August 14, 2010.
- Boxing Magazine editorial department, ed. (March 1, 2004). "三原正". 日本プロボクシングチャンピオン大鑑 (in Japanese). Tokyo, Japan: Baseball Magazine Sha Co., Ltd. p. 57. ISBN 978-4-583-03784-4.
- The Canadian Press (November 9, 1981). "Spinks gives Johnson a lesson". The Leader-Post. p. B7. Retrieved January 7, 2011.
- Boxing Magazine editorial department, ed. (May 31, 2002). 日本プロボクシング史 世界タイトルマッチで見る50年 (Japan Pro Boxing History – 50 Years of World Title Bouts) (in Japanese). Tokyo, Japan: Baseball Magazine Sha Co., Ltd. p. 279. ISBN 978-4-583-03695-3.
- "boxer: Tadashi Mihara". Boxrec. Retrieved 8 August 2010.
Title last held bySugar Ray Leonard
|WBA Junior Middleweight Champion
November 7, 1981–February 2, 1982