Seoul to Tokyo — Time Zone Converter
KST (UTC+9) → JST (UTC+9). Tokyo is the same offset relative to Seoul right now.
Seoul
Oct 7, 2026, 8:55 PM
Tokyo
Oct 7, 2026, 8:55 PM
Need the reverse? Tokyo to Seoul →
Sample times — KST to JST
Sample conversions for today; daylight saving applied.
About Seoul and TokyoSeoul vs Tokyo time difference through 2026
The gap stays at same time all year — neither place uses daylight saving time.
Dates (2026) KST JST 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
Seoul vs Tokyo time difference through 2026
The gap stays at same time all year — neither place uses daylight saving time.
| Dates (2026) | KST | JST | 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
Seoul to Tokyo is a zero-offset conversion. The two capitals run on the same clock, so cross-border standups and launches need no time-zone maths.
Frequently asked questions
What is the time difference between Seoul and Tokyo?
Right now the offset is about the same offset (from KST to JST). 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 Seoul vs Tokyo?
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 South Korea and Japan?
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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