Tipping in Japan

NO tip is expected at a restaurant 

Different from the practice in western countries, tipping is not customary in Japan. We Japanese don't tip waiters, hotel man or cab drivers etc. These people are paid for just their work; they are proud of doing a good job, and they don't expect any extra from the customers.
But some employees at western-style hotels are used to get tipping from westerners. They don't refuse the tip, BUT they don't expect it. (some hotels originally add a service charge to the bill.)

We may give tips to Japanese staff in special occasions -. If somebody provide something special for us, we tip to show appreciation.

But no tip is expected for standard good services in Japan.