Basically, in occidental culture, an employee feels more responsibility to the personal duty instead of company. If it is not necessary to ask help to organization, the employee complete his job by himself.
In Japanese culture is opposite. An employee feels more responsibility to the company. And Even if it’s not necessary ask and talk about concerning. Japanese company tries to make harmony and communication through event or ceremony.
If a person is not good at communicate with people will find difficulty working in a Japanese company. If a case which could be done the negotiation by yourself without asking opinion of the boss, you should ask. If not, sometimes the boss will flame you.
After the duty, your boss ask you to go to drink in somewhere, the boss is expecting an answer of Yes or Yes. Lately, I heard some companies changing little by little.