No, tipping is not a common practice in Japan. In fact, leaving a tip can sometimes be seen as confusing or even rude. In Japan, service is generally included in the price, and people take pride in providing excellent service as part of their job. Instead of tipping, expressing gratitude or saying "arigatou gozaimasu" (thank you very much) is the appropriate way to show appreciation for good service. If you try to tip, it's not uncommon for the staff to politely decline the offer.