Japan's Yusuke Kobori (R) fights with Namibia's Paulus Moses during their WBA lightweight title bout in Yokohama, southwest of Tokyo, January 3, 2009. REUTERS/Kim Kyung-Hoon (JAPAN)

Namibia's Paulus Moses (L) punches Japan's Yusuke Kobori during their WBA lightweight boxing title bout in Yokohama, southwest of Tokyo, January 3, 2009. REUTERS/Kim Kyung-Hoon (JAPAN)

Namibia's Paulus Moses (R) punches Japan's Yusuke Kobori during their WBA lightweight boxing title bout in Yokohama, southwest of Tokyo, January 3, 2009. REUTERS/Kim Kyung-Hoon (JAPAN)

Japan's Yusuke Kobori punches Namibia's Paulus Moses during their WBA lightweight boxing title match in Yokohama, southwest of Tokyo, January 3, 2009. REUTERS/Kim Kyung-Hoon (JAPAN)

New WBA lightweight champion Paulus Moses from Namibia poses with his trophies after his title bout against Japan's Yusuke Kobori (not in the picture) in Yokohama, southwest of Tokyo, January 3, 2009. REUTERS/Kim Kyung-Hoon (JAPAN)

Japan's Yusuke Kobori (R) stands near Namibia's new champion Paulus Moses after their WBA lightweight boxing title match in Yokohama, southwest of Tokyo, January 3, 2009. REUTERS/Kim Kyung-Hoon (JAPAN)

Japan's Yusuke Kobori (R) walks past Namibia's new champion Paulus Moses after their WBA lightweight boxing title match in Yokohama, southwest of Tokyo, January 3, 2009. REUTERS/Kim Kyung-Hoon (JAPAN)

Japan's Yusuke Kobori (L) celebrates after defeating Nicaragua's Jose Alfaro (C) during their World Boxing Association (WBA) lightweight title bout in Tokyo May 19, 2008. REUTERS/Toru Hanai (JAPAN)

Japan's Yusuke (R) is punched by Nicaragua's Jose Alfaro during their World Boxing Association (WBA) lightweight title bout in Tokyo May 19, 2008. REUTERS/Toru Hanai (JAPAN)

Nicaragua's Jose Alfaro (L) is punched by Japan's Yusuke Kobori during their World Boxing Association (WBA) lightweight title bout in Tokyo May 19, 2008. REUTERS/Toru Hanai (JAPAN)

Japan's Yusuke Kobori celebrates after defeating Nicaragua's Jose Alfaro during their World Boxing Association (WBA) lightweight title bout in Tokyo May 19, 2008. REUTERS/Toru Hanai (JAPAN)

Yusuke Kobori (R) of Japan lands a punch on Nicaragua's Jose Alfaro during their World Boxing Association (WBA) lightweight title bout in Tokyo May 19, 2008. REUTERS/Toru Hanai (JAPAN)

Japan's Yusuke Kobori (C) advances as Nicaragua's Jose Alfaro (L) falls during their World Boxing Association (WBA) lightweight title bout in Tokyo May 19, 2008. REUTERS/Toru Hanai (JAPAN)

Japan's Yusuke Kobori (C) poses with boxing promoter Don King (R) after defeating Nicaragua's Jose Alfaro at their World Boxing Association (WBA) lightweight title bout in Tokyo May 19, 2008. REUTERS/Toru Hanai (JAPAN)

Japan's Yusuke Kobori (L) celebrates after defeating Nicaragua's Jose Alfaro (2nd R) during their World Boxing Association (WBA) lightweight title bout in Tokyo May 19, 2008. REUTERS/Toru Hanai (JAPAN)