Is there a time difference between Tokyo and Seoul?

No. Tokyo uses JST (UTC+9) and Seoul uses KST (UTC+9). Both are exactly UTC+9, so the current time is always identical in both cities.

Do Japan or South Korea observe daylight saving time?

Neither Japan nor South Korea observes daylight saving time. Their UTC+9 offset is fixed year-round, so the relationship between the two cities never changes.

Was there ever a time difference between Tokyo and Seoul?

Historically yes. Korea used UTC+8:30 for a period and UTC+9 at other times. Since 1988, both countries have used UTC+9, making the clocks identical.

How do I convert 3 PM Tokyo time to Seoul time?

3 PM Tokyo time is exactly 3 PM Seoul time. Since both cities are UTC+9 with no daylight saving adjustments, any time in Tokyo maps one-to-one to the same time in Seoul.

Why does this tool show identical times for both cities?

Because that is correct. JST and KST share the UTC+9 offset. The tool shows the truth: there is zero offset between Tokyo and Seoul.

Time Difference: Tokyo to Seoul

See live current times in Tokyo and Seoul side-by-side and convert any custom time between JST and KST.

Live Clocks

Tokyo, Japan JST · UTC+9

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Seoul, South Korea KST · UTC+9

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Time Difference

0 hours

Tokyo and Seoul are always in sync — both UTC+9, no daylight saving.

Custom Time Converter

Enter a time From city

Quick Reference — Tokyo ↔ Seoul

Tokyo (JST)	Seoul (KST)	Note

Summary

Tokyo operates on Japan Standard Time (JST, UTC+9) and Seoul operates on Korea Standard Time (KST, UTC+9). Both cities share the exact same UTC offset, so there is no time difference between them. The current time is always identical in both cities. Use the converter below to translate any specific time from one city to the other, or simply read the live clocks.

How it works

The tool reads your device clock and converts it to UTC+9 for both Tokyo and Seoul.
Both cities use UTC+9 year-round — neither observes daylight saving time.
Because both offsets are identical, the displayed times are always the same.
To convert a custom time, enter hours and minutes in the input field and choose the source city.
The converted time for the destination city appears instantly with a plain explanation.

Use cases

Schedule a call with a colleague in Tokyo or Seoul from anywhere in the world.
Confirm meeting times when coordinating between Japan and South Korea.
Quickly check the current time in Tokyo and Seoul without a world clock app.
Understand why JST and KST always show the same time despite different names.
Convert a specific flight arrival or departure time between the two cities.
Plan a live stream or event that targets audiences in both Japan and Korea.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu