City comparison · time difference and converter
Gwangju vs Tokyo time difference and converter
Tokyo and Gwangju share the same wall clock right now right now. Gwangju sits in South Korea on Seoul; Tokyo sits in Japan on Tokyo. They are roughly 1,155 km apart (718 mi), a flight of about 2h 22m. Gwangju's metro holds around 1.4 million people; Tokyo's around 37.4 million.
Gwangju
Tokyo
Best meeting times today
Open converter →Slot 1
09:00 / 09:00
Gwangju / Tokyo
Both inside business hoursSlot 2
10:00 / 10:00
Gwangju / Tokyo
Both inside business hoursSlot 3
11:00 / 11:00
Gwangju / Tokyo
Both inside business hours24-hour comparison heatmap
Each row is one hour in Gwangju. 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.
Public holidays in November 2026
Culture Day
Tokyo, Japan · 文化の日
Tue, Nov 3
Labour Thanksgiving Day
Tokyo, Japan · 勤労感謝の日
Mon, Nov 23
Travel context
Great-circle distance
1,155 km
(718 mi)
Approximate flight
2h 22m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
0h
Roughly 1 day to adjust per timezone crossed
Convert any specific time
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 →Frequently asked questions
Working between Gwangju and Tokyo
The difference between Gwangju and Tokyo is not really a number, it's a daily rhythm. Tokyo and Gwangju share the same wall clock right now on the clock today, but the lived version is that the two cities share the same clock, so any meeting time that works for one works for the other. That gap, more than the raw offset, is what teams have to design around.
In Gwangju, the working day picks up earliest in the financial districts- Gwangju's downtown core wakes early and breaks for lunch at the usual hour. 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. South Korea 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 Gwangju 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 2h 22m 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 0-hour gap costs about 0 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.