Tokyo to Seoul — Time Zone Converter
JST (UTC+9) → KST (UTC+9). Seoul is the same offset relative to Tokyo right now.
Tokyo
Oct 7, 2026, 8:55 PM
Seoul
Oct 7, 2026, 8:55 PM
Need the reverse? Seoul to Tokyo →
Sample times — JST to KST
Sample conversions for today; daylight saving applied.
About Tokyo and SeoulTokyo vs Seoul time difference through 2026
The gap stays at same time all year — neither place uses daylight saving time.
Dates (2026) JST KST Difference Jan 1 – Dec 31 UTC+9 UTC+9 same time
Transition dates are the first full day on the new offset; clocks usually change overnight, between 1:00 and 3:00 local time.
Method & sources
Offsets and daylight-saving dates are computed from the IANA Time Zone Database through the JavaScript Intl API — the same rules your phone and computer use. The year table above was generated from those rules when this page was built; the live converter uses the rules installed in your own browser, so it stays correct if a country changes its clocks.
Page last updated: October 1, 2026
Tokyo vs Seoul time difference through 2026
The gap stays at same time all year — neither place uses daylight saving time.
| Dates (2026) | JST | KST | Difference |
|---|---|---|---|
| Jan 1 – Dec 31 | UTC+9 | UTC+9 | same time |
Transition dates are the first full day on the new offset; clocks usually change overnight, between 1:00 and 3:00 local time.
Method & sources
Offsets and daylight-saving dates are computed from the IANA Time Zone Database through the JavaScript Intl API — the same rules your phone and computer use. The year table above was generated from those rules when this page was built; the live converter uses the rules installed in your own browser, so it stays correct if a country changes its clocks.
Page last updated: October 1, 2026
Tokyo and Seoul both sit at UTC+9 with no daylight saving, so the clocks match exactly year-round. Gaming, electronics, and entertainment teams treat the two cities as one time zone.
Frequently asked questions
What is the time difference between Tokyo and Seoul?
Right now the offset is about the same offset (from JST to KST). Daylight saving rules differ by region, so use the converter and table above rather than memorising a single number year-round.
Does daylight saving affect Tokyo vs Seoul?
Yes, whenever either region springs forward or falls back, the gap can shift by an hour. This page uses the IANA time-zone database so those transitions are applied automatically.
How do I schedule a meeting across Japan and South Korea?
Pick a time in the converter, share both columns with attendees, and avoid early-morning or late-night slots on one side. The sample table lists common business hours in the source zone.
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