What is the time difference between Seoul and Tokyo?

Tokyo is 0 minutes behind Seoul. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.

When is the best time to call Tokyo from Seoul?

Between 09:00–18:00 in Seoul, which is 09:00–18:00 in Tokyo. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Seoul observe daylight saving time?

No. Seoul stays on UTC+9 all year, so its clocks never move.

Does Tokyo observe daylight saving time?

No. Tokyo stays on UTC+9 all year, so its clocks never move.

If it is midday in Seoul, what time is it in Tokyo?

It is 12:00 in Tokyo, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.

Which time zones do Seoul and Tokyo use?

Seoul uses Asia/Seoul, currently UTC+9, and Tokyo uses Asia/Tokyo, currently UTC+9. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Seoul time to Tokyo time

Tokyo is 0 minutes behind Seoul right now, so midday in Seoul lands in the afternoon in Tokyo.

Convert a time

From

Date

Time

Converted time

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The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

Every hour of a day in Seoul, and what the clock reads in Tokyo at that same moment.

Seoul	Tokyo
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

Daylight saving time

Neither Seoul nor Tokyo changes its clocks, so the difference between them is the same every day of the year.

Seoul

Does not observe daylight saving time

Standard: UTC+9

Tokyo

Does not observe daylight saving time

Standard: UTC+9

When you can actually talk

The window is 9 hours wide — 09:00–18:00 in Seoul, 09:00–18:00 in Tokyo.

Seoul 09:00–18:00Tokyo 09:00–18:00

Reference

The zone identifiers and offsets behind everything above.

	Seoul	Tokyo
IANA zone	Asia/Seoul	Asia/Tokyo
Abbreviation	UTC+9	UTC+9
Standard offset	UTC+9	UTC+9
Daylight offset	—	—
Clock changes this year	0	0
Country	South Korea	Japan

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between Seoul and Tokyo?: Tokyo is 0 minutes behind Seoul. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.
When is the best time to call Tokyo from Seoul?: Between 09:00–18:00 in Seoul, which is 09:00–18:00 in Tokyo. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Seoul observe daylight saving time?: No. Seoul stays on UTC+9 all year, so its clocks never move.
Does Tokyo observe daylight saving time?: No. Tokyo stays on UTC+9 all year, so its clocks never move.
If it is midday in Seoul, what time is it in Tokyo?: It is 12:00 in Tokyo, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.
Which time zones do Seoul and Tokyo use?: Seoul uses Asia/Seoul, currently UTC+9, and Tokyo uses Asia/Tokyo, currently UTC+9. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.