Japan is one of the developed countries in the world, basically Japanese are always looking for perfection. They love doing work after work that's why they have little bit opportunities to entertain themselves. Without refreshing no one can gain the hope of life. Besides work everybody should enjoy his or her life. Except this you will become a robot, then you only find yourself in working, after that you feel extremely frustrations and it will lead you to dangerous way of Life.
This is the difference between the working conditions in Japan and Germany. In Japan, there is no divide between work and life. People work for 12-13 hours a day, and even after that time they think about work. They hardly ever take holidays or vacations. The situation is different in Germany. They work for 7-8 hours a day, and after that they don't bother about work. They take regular vacations with their family, unlike the Japanese.
We also work for 12-13 hours and do not commit so many suicides because of this. Everything depends on the inner mood of a person.