Japan's Yamanaka scores 7th-round KO in 8th defense of WBC bantam title

Japan's Yamanaka scores 7th-round KO in 8th defense of WBC bantam title

WBC bantamweight champion Shinsuke Yamanaka of Japan holds his son after defeating challenger Diego Santillan of Argentina in their fight at Bodymaker Colosseum in Osaka, Japan, on April 16, 2015. Yamanaka scored a seventh-round knockout in front of his hometown fans for his eighth successful defense of the title. (Kyodo) ==Kyodo

Japan's Yamanaka scores 7th-round KO in 8th defense of WBC bantam title

Japan's Yamanaka scores 7th-round KO in 8th defense of WBC bantam title

WBC bantamweight champion Shinsuke Yamanaka of Japan celebrates after defeating challenger Diego Santillan of Argentina in their fight at Bodymaker Colosseum in Osaka, Japan, on April 16, 2015. Yamanaka scored a seventh-round knockout in front of his hometown fans for his eighth successful defense of the title. (Kyodo) ==Kyodo

Japan's Yamanaka gets 7th-round KO in 8th defense of WBC bantam title

Japan's Yamanaka gets 7th-round KO in 8th defense of WBC bantam title

WBC bantamweight champion Shinsuke Yamanaka of Japan (R) knocks down challenger Diego Santillan of Argentina in the seventh round of their match at Bodymaker Colosseum in Osaka, western Japan, on April 16, 2015, to successfully defend his eighth title in front of his hometown fans. (Kyodo) ==Kyodo

Japan's Yamanaka scores 7th-round KO in 8th defense of WBC bantam title

Japan's Yamanaka scores 7th-round KO in 8th defense of WBC bantam title

WBC bantamweight champion Shinsuke Yamanaka of Japan (R) delivers a punch to challenger Diego Santillan of Argentina in the fifth round of their fight at Bodymaker Colosseum in Osaka, Japan, on April 16, 2015. Yamanaka scored a seventh-round knockout in front of his hometown fans for an eighth successful defense of the title. (Kyodo) ==Kyodo

Japan's Yamanaka scores 7th-round KO in 8th defense of WBC bantam title

Japan's Yamanaka scores 7th-round KO in 8th defense of WBC bantam title

WBC bantamweight champion Shinsuke Yamanaka of Japan (R) delivers a punch to challenger Diego Santillan of Argentina in the fifth round of their fight at Bodymaker Colosseum in Osaka, Japan, on April 16, 2015. Yamanaka scored a seventh-round knockout in front of his hometown fans for an eighth successful defense of the title. (Kyodo) ==Kyodo

Japan's Yamanaka scores 7th-round KO in 8th defense of WBC bantam title

Japan's Yamanaka scores 7th-round KO in 8th defense of WBC bantam title

WBC bantamweight champion Shinsuke Yamanaka of Japan celebrates after defeating challenger Diego Santillan of Argentina in their fight at Bodymaker Colosseum in Osaka, Japan, on April 16, 2015. Yamanaka scored a seventh-round knockout in front of his hometown fans for his eighth successful defense of the title. (Kyodo) ==Kyodo