Tokyo is 2 hours ahead of Hanoi. Hanoi uses Indochina Time (ICT, UTC+7) while Tokyo uses Japan Standard Time (JST, UTC+9). When it's 12:00 PM in Hanoi, it's 2:00 PM in Tokyo.
Neither city observes daylight saving time, so the 2-hour difference remains constant year-round.
Best calling time: 7:00 AM - 3:00 PM Hanoi time. This corresponds to 9:00 AM - 5:00 PM in Tokyo, covering Japanese business hours.
Hanoi and Tokyo are connected by direct flights taking about 5 hours. Japan is one of Vietnam's largest trading partners and investors, with significant ties in manufacturing, infrastructure, and development aid.