Junior bantamweight titlist Daiki Kameda of Japan relinquished his belt on Wednesday. He said it is a struggle to continue to make the 115-pound weight limit.
Kameda met with reporters in Tokyo before heading to Miami for two months of training.
"There are many strong boxers in Miami. I want to engage in boxing from scratch again,” he told the reporters.
Kameda lost his last fight but did not lose his belt. That is because he was supposed to fight fellow titleholder Liborio Solis in a title unification fight on Dec. 3. While the fight went on and Kameda lost a split decision in Osaka, Japan, Solis failed to make weight, coming in at 117½ pounds.
Solis was stripped of his version of the title. While Kameda could have won the belt stripped from Solis, he could not lose his title, per IBF rules.
"The reason I lost is that I was weak. I must admit this," Kameda said during his meeting with reporters.
Kameda (29-4, 18 KOs) and brothers Tomoki Kameda (bantamweight titlist) and Koki Kameda (who recently gave up his version of the bantamweight title to go up in weight) became the first trio of brothers to hold world titles at the same time when Daiki won his belt in September.