Does this converter handle daylight saving time?

Yes. The offset between Seoul and Tokyo 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.

🇰🇷 Seoul to Tokyo 🇯🇵 time converter

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

Tokyo is currently in the same time as Seoul.

Seoul: Sun, Jun 21, 2026, 3:29 AM UTC+09:00 (GMT+9) · Tokyo: Sun, Jun 21, 2026, 3:29 AM UTC+09:00 (GMT+9)

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

Convert Seoul to Tokyo 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%2FSeoul&to=Asia%2FTokyo&time=2008-11-04T09%3A00"

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

Current offsets

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

FAQ

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