Seoul time to Tokyo time
Tokyo is 0 hours ahead of Seoul all year (Seoul GMT+9/UTC+09:00 in summer; Tokyo GMT+9/UTC+09:00). Enter a Seoul time below to convert it, or leave it blank to see the current time in both cities.
How to use the Seoul to Tokyo time
- Type a Seoul time (24-hour) and optionally a date, or leave blank for now.
- Click Convert.
- Read the Tokyo time and the working-hours table.
Time difference between Seoul and Tokyo
Tokyo is 0 hours ahead of Seoul all year. Neither city changes its clocks, so the difference is the same all year. Seoul uses Asia/Seoul time (UTC+09:00 in January, UTC+09:00 in July); Tokyo uses Asia/Tokyo (UTC+09:00 in January, UTC+09:00 in July).
Working week in Seoul and Tokyo
Seoul: Korea Standard Time, UTC+9 all year. Office hours 09:00–18:00, weekend Saturday–Sunday.
Tokyo: Japan Standard Time, UTC+9 all year; Japan has never adopted daylight saving. Office hours 09:00–18:00, weekend Saturday–Sunday; Golden Week (late April–early May) and Obon (mid-August) are holiday periods.
Quick conversion table (summer difference)
| Seoul | Tokyo |
|---|---|
| 08:00 | 08:00 |
| 09:00 | 09:00 |
| 10:00 | 10:00 |
| 12:00 | 12:00 |
| 14:00 | 14:00 |
| 16:00 | 16:00 |
| 18:00 | 18:00 |
| 20:00 | 20:00 |
| 22:00 | 22:00 |
Table uses the July difference; the tool above applies the exact rule for any date.
Best time to call between Seoul and Tokyo
Within normal office hours (09:00–18:00) in both cities: 9:00–17:00 Seoul time. For a compromise outside that window, the fairest slots are the ones nearest each side's start or end of day, alternating who takes the inconvenient hour.
Reverse
Need the other direction? See Tokyo to Seoul, or the general time zone converter.
Frequently asked questions
How many hours ahead is Tokyo from Seoul?
Tokyo is 0 hours ahead of Seoul all year.
When it is 12:00 noon in Seoul, what time is it in Tokyo?
12:00 in summer (); use the tool for a specific date.
Does the converter handle daylight saving?
Yes, for the exact date you enter, using the IANA time-zone rules in your browser.
Privacy
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Last updated 2026-09-23.