The remaining days of one of the J. League's most tenacious managers may be numbered.

This week's conclusion of the summer transfer window has been largely overshadowed by the controversy surrounding Shonan Bellmare boss Cho Kwi-jea and accusations of power harassment that could force him to leave the Kanagawa Prefecture club as early as this month.

Now in his eighth year in charge of the first-division side, the former defender has become renowned for his disciplinarian style, regularly drilling his players with physically intense training sessions that have given the team the nickname "Running Shonan."