With Japanese business culture what it is.. I'm not surprised. People feel like they have to be the first one in the office and the last one to leave every day in order to have a chance at promotion. Even when they do "go out", it's often with coworkers and bosses.

They treat people "like family", meaning they ask too much from their employees for too little pay. The emotional manipulation is so huge, it's like any other abusive relationship. It's not a surprise people need help getting out.