Live · calculated from the IANA time-zone database

Time difference between Tokyo and Seoul

Short answer

Tokyo and Seoul are on the same time. Right now it is 21:33 in Tokyo (GMT+9, UTC+9) and 21:33 in Seoul (GMT+9, UTC+9).

Right now

Tokyo · Japan

21:33

Tuesday, September 15, 2026

Japan Standard Time · GMT+9 · UTC+9

Seoul · South Korea

21:33

Tuesday, September 15, 2026

Korean Standard Time · GMT+9 · UTC+9

Times at the moment this page was generated. Reload for a fresh reading.

Does the difference between Tokyo and Seoul change during the year?

No. The difference is 0 minutes for the whole of 2026: neither city observes daylight saving time.

Best time to call Seoul from Tokyo (and vice versa)

The window in which both cities are inside their 9:00–17:00 working day runs from 09:00 to 17:00 in Tokyo, which is 09:00 to 17:00 in Seoul: 8 hours of overlap per day. For a call that disturbs nobody, aim for the middle of that window.

Outside that window, the practical rule: mornings in Tokyo are afternoons in Seoul. Avoid any hour that falls before 8:00 or after 21:00 in either city.

Tokyo to Seoul conversion table

Each Tokyo hour and its equivalent in Seoul today. Rows shaded green are working hours (9:00–17:00) in both cities at once.

Tokyo time · Tue, Sep 15	Seoul time
00:00	00:00
01:00	01:00
02:00	02:00
03:00	03:00
04:00	04:00
05:00	05:00
06:00	06:00
07:00	07:00
08:00	08:00
09:00	09:00
10:00	10:00
11:00	11:00
12:00	12:00
13:00	13:00
14:00	14:00
15:00	15:00
16:00	16:00
17:00	17:00
18:00	18:00
19:00	19:00
20:00	20:00
21:00	21:00
22:00	22:00
23:00	23:00

Looking for it the other way round? This page covers both directions: Seoul to Tokyo is the same difference with the sign flipped.

The two time zones

Tokyo — Asia/Tokyo

Tokyo keeps Japan Standard Time (JST), a fixed UTC+9 with no daylight saving. Japan and South Korea share the offset, so Tokyo and Seoul are always on the same clock.

Seoul — Asia/Seoul

Seoul keeps Korea Standard Time (UTC+9), identical to Tokyo all year round.

Frequently asked questions

How many hours difference between Tokyo and Seoul?

Tokyo and Seoul are on the same time. The difference is the same all year: neither city changes its clocks.

When it is 12:00 noon in Tokyo, what time is it in Seoul?

12:00 in Seoul (at today's difference of 0 minutes).

What is the best time for a meeting between Tokyo and Seoul?

Between 09:00 and 17:00 in Tokyo, which is 09:00–17:00 in Seoul: 8 hours of overlap inside both cities' 9:00–17:00 working day.

Do Tokyo and Seoul observe daylight saving time?

Tokyo: no. Seoul: no. Neither changes, so the difference is fixed.

What time zone is Tokyo in? And Seoul?

Tokyo: Japan Standard Time (Asia/Tokyo, UTC+9). Seoul: Korean Standard Time (Asia/Seoul, UTC+9).

Tools

Meeting grid — add both cities and click a slot

Time zone converter — any city, any time

Working hours overlap calculator

Daylight saving time 2027 — all dates