Full name
Jirou Watanabe

Date of birth
March 16, 1955

Debut
On March 27, 1979, in Okayama, Japan, he knocked out Keizo Miyazaki in three rounds.

Won The World Title
On April 8, 1982, in Osaka, Japan, he defeated Panamanian Rafael Pedroza by unanimous decision and won the World Boxing Association super flyweight title.

Lost His Title
In the twelfth defense on March 30, 1986, in Hyogo, Japan, the Mexican Gilberto Román defeated him by unanimous decision.

Withdrawal
On March 30, 1986, after the defeat with Gilberto Román