Tokyo time to Seoul time
Seoul is 0 hours ahead of Tokyo all year (Tokyo GMT+9/UTC+09:00 in summer; Seoul GMT+9/UTC+09:00). Enter a Tokyo time below to convert it, or leave it blank to see the current time in both cities.
How to use the Tokyo to Seoul time
- Type a Tokyo time (24-hour) and optionally a date, or leave blank for now.
- Click Convert.
- Read the Seoul time and the working-hours table.
Time difference between Tokyo and Seoul
Seoul is 0 hours ahead of Tokyo all year. Neither city changes its clocks, so the difference is the same all year. Tokyo uses Asia/Tokyo time (UTC+09:00 in January, UTC+09:00 in July); Seoul uses Asia/Seoul (UTC+09:00 in January, UTC+09:00 in July).
Working week in Tokyo and Seoul
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.
Seoul: Korea Standard Time, UTC+9 all year. Office hours 09:00–18:00, weekend Saturday–Sunday.
Quick conversion table (summer difference)
| Tokyo | Seoul |
|---|---|
| 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 Tokyo and Seoul
Within normal office hours (09:00–18:00) in both cities: 9:00–17:00 Tokyo 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 Seoul to Tokyo, or the general time zone converter.
Frequently asked questions
How many hours ahead is Seoul from Tokyo?
Seoul is 0 hours ahead of Tokyo all year.
When it is 12:00 noon in Tokyo, what time is it in Seoul?
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
This tool runs entirely inside your browser using WebAssembly and the Canvas/File APIs. Your files are never uploaded to ToolFlint or any third party; you can verify this in your browser's network tab or by switching to airplane mode after the page loads. Read how we process files.
Last updated 2026-09-23.