Tokyo time to London time
London is 9 hours behind Tokyo in January and 8 hours behind in July (Tokyo GMT+9/UTC+09:00 in summer; London BST/UTC+01:00). 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 London time
- Type a Tokyo time (24-hour) and optionally a date, or leave blank for now.
- Click Convert.
- Read the London time and the working-hours table.
Time difference between Tokyo and London
London is 9 hours behind Tokyo in January and 8 hours behind in July. London observes daylight saving time and Tokyo does not, so the difference changes twice a year. Tokyo uses Asia/Tokyo time (UTC+09:00 in January, UTC+09:00 in July); London uses Europe/London (UTC+00:00 in January, UTC+01:00 in July).
Working week in Tokyo and London
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.
London: Office hours 09:00–17:30, weekend Saturday–Sunday. Clocks go forward on the last Sunday of March (BST, UTC+1) and back on the last Sunday of October (GMT).
Quick conversion table (summer difference)
| Tokyo | London |
|---|---|
| 08:00 | 00:00 |
| 09:00 | 01:00 |
| 10:00 | 02:00 |
| 12:00 | 04:00 |
| 14:00 | 06:00 |
| 16:00 | 08:00 |
| 18:00 | 10:00 |
| 20:00 | 12:00 |
| 22:00 | 14:00 |
Table uses the July difference; the tool above applies the exact rule for any date.
Best time to call between Tokyo and London
Within normal office hours (09:00–18:00) in both cities: 17:00–17:00 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 London to Tokyo, or the general time zone converter.
Frequently asked questions
How many hours ahead is London from Tokyo?
London is 9 hours behind Tokyo in January and 8 hours behind in July.
When it is 12:00 noon in Tokyo, what time is it in London?
04:00 in summer (the same or previous day); 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.