City comparison · time difference and converter
Tokyo is 1 hour ahead of Singapore right now. Singapore sits in Singapore on Singapore; Tokyo sits in Japan on Tokyo. They are roughly 5,311 km apart (3,300 mi), a flight of about 7h 15m. Singapore's metro holds around 5.9 million people; Tokyo's around 37.4 million.
Slot 1
09:00 / 10:00
Singapore / Tokyo
Both inside business hoursSlot 2
10:00 / 11:00
Singapore / Tokyo
Both inside business hoursSlot 3
11:00 / 12:00
Singapore / Tokyo
Both inside business hoursEach row is one hour in Singapore. Green rows are inside business hours in both cities; amber means only one side is at their desk; grey rows fall outside business hours in both.
No public holidays in Singapore or Japan this month.
Great-circle distance
5,311 km
(3,300 mi)
Approximate flight
7h 15m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
1h
Roughly 1 day to adjust per timezone crossed
The heatmap gives you the shape of the day. If you need to convert one specific hour — say a customer call or a release window — open the converter with both cities already loaded.
Open in converter →The difference between Singapore and Tokyo is not really a number, it's a daily rhythm. Tokyo is 1 hour ahead of Singapore on the clock today, but the lived version is that Tokyo is wrapping up the working day while Singapore is still in the morning, and the overlap people actually use is narrow. That gap, more than the raw offset, is what teams have to design around.
In Singapore, the working day picks up earliest in the financial districts — CBD towers in Raffles Place light up by 08:00 and the lunch crowd hits 12:30 sharp. The mood in Tokyo is its own story: Shibuya's office workers leave around 19:00, often heading to izakayas, then home on the last train. If you are scheduling between the two, the heatmap above marks the rows where both patterns line up.
Daylight saving is the other thing to keep an eye on. Singapore either observes DST or holds a fixed offset year-round; Japan either follows its region's DST pattern or stays put all year. When the two changes are weeks apart, the offset between Singapore and Tokyo is one hour off the usual for that stretch — a cliff that catches recurring calendar invites unless your calendar app rebases them automatically. Pin the meeting to a city, not an offset, and the tool handles the rest.
For travellers, the 7h 15m flight is the short version of the story. The longer one is jet lag: roughly one day of adjustment per timezone crossed, which means a trip across the 1-hour gap costs about 1 groggy days on each side. Pilots and cabin crew swear by morning sunlight and an early walk; whatever your routine, the wall-clock numbers above are the source of truth for your first morning in the new city.