Tipping customs vary widely around the world; know local practices to avoid offense. In Japan, being a tipper is often considered rude, unlike in the USA.
Pro Tip 2/3
Service Quality
The amount a tipper gives usually reflects their satisfaction with the service. He tipped generously, showing he was a happy tipper after a delightful meal.
Pro Tip 3/3
Optional Gratuity
Tipping is often optional and not included in the bill, except for large groups. As a solo diner, he wasn't obligated but chose to be a good tipper.