London time to Tokyo time
Tokyo is 9 hours ahead of London in January and 8 hours ahead of in July (London BST/UTC+01:00 in summer; Tokyo GMT+9/UTC+09:00). Enter a London time below to convert it, or leave it blank to see the current time in both cities.
How to use the London to Tokyo time
- Type a London 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 London and Tokyo
Tokyo is 9 hours ahead of London in January and 8 hours ahead of in July. London observes daylight saving time and Tokyo does not, so the difference changes twice a year. London uses Europe/London time (UTC+00:00 in January, UTC+01:00 in July); Tokyo uses Asia/Tokyo (UTC+09:00 in January, UTC+09:00 in July).
Working week in London and Tokyo
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).
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)
| London | Tokyo |
|---|---|
| 08:00 | 16:00 |
| 09:00 | 17:00 |
| 10:00 | 18:00 |
| 12:00 | 20:00 |
| 14:00 | 22:00 |
| 16:00 | 00:00 (next day) |
| 18:00 | 02:00 (next day) |
| 20:00 | 04:00 (next day) |
| 22:00 | 06:00 (next day) |
Table uses the July difference; the tool above applies the exact rule for any date.
Best time to call between London and Tokyo
Within normal office hours (09:00–18:00) in both cities: 9:00–9:00 London 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 London, or the general time zone converter.
Frequently asked questions
How many hours ahead is Tokyo from London?
Tokyo is 9 hours ahead of London in January and 8 hours ahead of in July.
When it is 12:00 noon in London, what time is it in Tokyo?
20:00 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.