China – No tipping in China. Hotels that serve foreign tourists allow tipping for tour guides and associated drivers.
Hong Kong – Tipping is not expected… in restaurants or hotels, a “service charge” of 10% is added to a bill instead of expecting the tip. Taxi drivers round a sum as a “courtesy fee” to avoid making change for larger bills.
Japan – Tipping is not expected and can make the people of Nippon very confused. Japanese people, like other people in Asia, see tipping as an insult. For example, the Japanese consider carrying your luggage to your hotel room for you a hospitality.
India – Tipping is popular here in whole market. As for the half market, well.
Indonesia – Here the tipping is expected at full-service restaurants (10-15%), common in large tourist areas. Bar tipping depends on the bar. Taxi drivers expect 5% and bellboys at high end hotels want your $1 per bag. Or your bag for $1. Depends how you read this. Just kidding; the first one.
South Korea – Tipping is not expected or customary, and sometimes even regarded as an insult. High-end places will include a service charge of 10%-15%, but this is already in the bill.
Singapore – Tipping here is an insult, and the Singaporians might think you’re trying to bribe them, and could throw you in jail. Servers get 10% automatically that is added to your bill (by the way, you also pay an additional 7% Goods and Services Tax, but this does not go to your server).
Taiwan – Not a custom here, either. The 10% service charge is in place here, but this is not given to the wait staff. This is what Taipei Times has named “False Gratuity”.