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

Name: Time Difference: Tokyo to Seoul
Availability: InStock
Author: Nham Vu

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

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

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: 2026-07-26 · Reviewed by Nham Vu