Why Do Japanese Companies Require Employees Commitment to Work
Usually Japanese employees do not have clearly defined job descriptions. They are expected to work in an environment of constant team contact, feedback, and direction. Team players are supposed to help one another out, so if their own work is done, they are expected to stay late to help other team members finish their work. This gives them much less control over their time.
In Japanese companies that still mostly follow the lifetime employment model there is less concern for using employees’ time efficiently. After all, employees belong to their company from the ages of 22 to 65, so preserving their personal time is less of an issue. Things are changing at the moment amid the so-called, "Hatarakikata Kaikaku (change of work style)", but protecting their own personal time is still underway.