Korea vs Japan Time: Is There Any Difference?
Wondering whether Seoul and Tokyo are on different clocks? Here's the simple answer — and what it means for comebacks, travel and jet lag.
Is there a time difference between Korea and Japan?
No — there is no time difference between Korea and Japan.
Korea Standard Time (KST) and Japan Standard Time (JST) are both UTC+9, and neither country uses daylight saving, so Seoul and Tokyo show the exact same time every day of the year.
There is nothing to convert.
| Seoul — Korea | Tokyo — Japan | |
|---|---|---|
| Time zone | KST | JST |
| UTC offset | UTC+9 | UTC+9 |
| Daylight saving | None | None |
| Clock shown | Identical | Identical |
| Time difference | 0 hours — all year round | |
Because both countries are fixed on UTC+9 with no daylight saving, the Korea–Japan time difference is always zero and never changes with the seasons.
What that actually means
K-pop drops are simultaneous. A comeback at 6 PM KST is 6 PM JST — Korean and Japanese fans hit play at the same moment.
The same goes for music shows, livestreams and countdowns.
No jet lag on a Korea–Japan trip.
Fly Seoul to Tokyo (or the reverse) and your watch stays right; there's no time change to sleep off, which makes a two-country trip easy to plan.
"How many hours?" — zero.
If you searched to be sure before a call or a flight: the difference is none, and it never shifts with the seasons.
Comparing to other regions
Where the gap does get big is the rest of the world.
If you're coordinating with fans or family elsewhere, see how many hours ahead Korea is, or the US and Europe hubs — and for release timing, K-pop comeback times.
Frequently asked
Are Seoul and Tokyo in the same time zone?
Yes. Both Korea (KST) and Japan (JST) are UTC+9, so Seoul and Tokyo always show the same time.
Are Korea and Japan in the same time zone?
Yes — Korea and Japan are in the same time zone. Both use UTC+9 (KST and JST) with no daylight saving, so the two countries always share the same clock.
Do either country use daylight saving?
No. Neither Korea nor Japan observes daylight saving, so the two stay in step all year.
Will I get jet lag between Korea and Japan?
No time-zone jet lag — the clock is identical, so a Seoul–Tokyo trip has zero time change to adjust to.
Does a 6 PM KST comeback air at the same time in Japan?
Yes — 6 PM KST is 6 PM JST, so K-pop drops and broadcasts happen simultaneously in both countries.
Last updated: September 2026
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