A Japanese national, by the name Kozuma Rintaro, working as an associate professor at Ritsumeikan APU has dated other woman, while being married with a child. There may be many others because dishonest behavior is his hobby and he has a manipulative character. New wary of him, as many college students may be at risk. Please report if similar incidents have happened to you. Unfortunately, the university has taken no action against him so far.