Does this converter handle daylight saving time?

Yes. The offset between Tokyo and Seoul can change across the year as either zone enters or leaves DST. Pick any date in the converter and the exact offset for that date is used.

🇯🇵 Tokyo to Seoul 🇰🇷 time converter

Convert any time from Tokyo (JST) to Seoul (KST), with daylight saving handled correctly for the date you choose.

Seoul is currently in the same time as Tokyo.

Tokyo: Sun, Jun 21, 2026, 3:05 PM UTC+09:00 (GMT+9) · Seoul: Sun, Jun 21, 2026, 3:05 PM UTC+09:00 (GMT+9)

Tokyo 00h → 23hblue/green = 9am–6pm working hoursSeoul local hour

Convert Tokyo to Seoul on any date

From zone

To zone

Date & time (in “from” zone)

Get this conversion as JSON (developer API)

curl "https://tz.wrapper-agency.com/api/v1/tz?from=Asia%2FTokyo&to=Asia%2FSeoul&time=2008-11-04T09%3A00"

Free timezone API — no key during beta. DST-correct, IANA tz database.

Current offsets

🇯🇵 Tokyo	UTC+09:00
🇰🇷 Seoul	UTC+09:00
Difference	0h

FAQ

What time is it in Seoul when it's noon in Tokyo?: Use the converter above — enter 12:00 on your date in Tokyo and you'll get the exact Seoul local time, DST included.
Why does the time difference change during the year?: Tokyo and Seoul may observe daylight saving on different schedules (or not at all), so the gap between them shifts on clock-change dates.