The company that manages the three boxing Kameda brothers said Saturday that the management of their Kameda Gym have filed a suit against the Japan Boxing Commission, claiming the gym’s de facto suspension is unreasonable.

The suit was filed with the Tokyo District Court by gym chairman Shinji Yoshii and manager Satoshi Shima, whose licenses the JBC has refused to renew, effectively prohibiting Kameda Gym fighters from competing in Japan. The measure taken in February was punishment for the confusion that tarnished Daiki Kameda’s IBF super flyweight title match in December last year.

Kameda lost his unification title bout against Liborio Solis of Venezuela, but still retained the title after Solis failed to make weight.

The International Boxing Federation had said prior to the bout that both titles would become vacant in the event Solis won, but inexplicably overturned its own rule and declared Kameda the IBF champion despite his defeat.

The ruling sparked a controversy with the JBC, which claimed the Kameda camp was negligent in reporting that its fighter could retain the IBF crown win, lose or draw, although it was aware of this fact in advance.