The Japan Boxing Commission said Monday it has handed Kenichi Ogawa a one-year suspension after he became the first Japanese boxer to be stripped of a world title for failing a doping test.

Ogawa lost his International Boxing Federation super featherweight belt and was banned for six months after a doping test conducted in the lead-up to his Dec. 9 title fight in Las Vegas against American Tevin Farmer came back positive.

The JBC's suspension is retroactive to Dec. 10, the day after Ogawa won the then-vacant title by beating Farmer in a split decision.

In April, the Nevada State Athletic Commission invalidated the fight and determined the six-month ban for the 30-year-old Ogawa after it was confirmed he tested positive for two forms of androstanediol, a synthetic testosterone, in a urine test conducted on Dec. 5.

A drug test after the fight came back negative, and Ogawa has denied knowingly ingesting a banned substance.

Following news of the positive test in January, a source close to the matter said medicine for Ogawa's skin condition may have triggered the positive result. The boxer has submitted the medication in question to the NSAC.

IN OTHER NEWS: Former Commonwealth welterweight challenger Jack "Gelignite" Brubaker (14-3-1, 7 KOs) scored a unanimous 12-round decision over Englishman Tyrone Nurse (35-4-2, 7 KOs) in a Commonwealth Welterweight elimination bout, organized by  Johnny Lewis at the Star Casino in Sydney, New Wales, Australia.

The scores of the judges were 115-113, 116-112, 116-112.   In another fight,  Ben Savva (9-1, 3 KOs) defeated  Kyron Dryden (10-2, 8 KOs) in twelve rounds to conquer the OPBF belt.  Dryden went down  in the fourth round from a body shot,  and in the ninth round he was deducted with a point by Referee Mick Heafey for throwing low blows. The scores were 119-107, 117-109, 118-109.

Light heavyweight Tim Tszyu (9-0, 7 KOs) stopped Larry Siwu (27-11, 23 KOs) in the fourth round of a scheduled ten round bout, with the Asian Continental title of the World Boxing Council on the line.  Referee Les Fear announced the Tszyu  victory  at 0:44 of the fourth round,  after the Indonesian was knocked down and unable to continue. Tszyu is the son of the legendary fighter Kostya Tszyu.