Time Difference Between London and Japan
As of 31 August 2026, Japan is 8 hours ahead of London. That number is not constant. Over the course of a year, because of daylight saving changes, Tokyo, Japan ranges from 8 hours ahead to 9 hours ahead relative to London, United Kingdom. The calculator below is always up to date.
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London, United Kingdom
23:34
Mon, Aug 31, 2026
UTC+1 · Europe/London
Tokyo, Japan
+8h07:34
Tue, Sep 1, 2026
UTC+9 · Asia/Tokyo
Japan is 8 hours ahead of London.
When it is 23:34 in London, it is already the next day in Japan.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| London | Monday, August 31, 2026 | Europe/London | UTC+1 | Active now |
| Japan | Tuesday, September 1, 2026 | Asia/Tokyo | UTC+9 | Not observed |
Hour by hour: London to Japan
Every hour of today in London and what it is in Japan. Highlighted rows fall inside Japan working hours (09:00–18:00).
| London | Japan |
|---|---|
| 00:00 | 08:00 |
| 01:00 | 09:00 |
| 02:00 | 10:00 |
| 03:00 | 11:00 |
| 04:00 | 12:00 |
| 05:00 | 13:00 |
| 06:00 | 14:00 |
| 07:00 | 15:00 |
| 08:00 | 16:00 |
| 09:00 | 17:00 |
| 10:00 | 18:00 |
| 11:00 | 19:00 |
| London | Japan |
|---|---|
| 12:00 | 20:00 |
| 13:00 | 21:00 |
| 14:00 | 22:00 |
| 15:00 | 23:00 |
| 16:00 | 00:00next day |
| 17:00 | 01:00next day |
| 18:00 | 02:00next day |
| 19:00 | 03:00next day |
| 20:00 | 04:00next day |
| 21:00 | 05:00next day |
| 22:00 | 06:00next day |
| 23:00 | 07:00next day |
Best time to call or meet
Overlapping working hours
09:00–10:00 in London (17:00–18:00 in Japan)
Both places are inside 09:00–18:00 for 1 hour a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
08:00–13:00 in London (16:00–21:00 in Japan)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
London puts its clocks back on Sunday, October 25, 2026
The local offset moves from UTC+1 to UTC. After that date, Japan is 9 hours ahead of London — instead of 8 hours ahead, as it is today.
Planning something with more than two places?
Adding a third city usually kills the obvious answer. The Meeting Time Finder takes up to five cities at once and shows only the hours that work for everybody.
London and Japan: common questions
What is the time difference between London and Japan?
As of 31 August 2026, Japan is 8 hours ahead of London. The gap is not fixed: across the year, Japan ranges from 8 hours ahead to 9 hours ahead relative to London, as clocks change. The calculator on this page always shows the difference for right now.
When it is 9:00 AM in London, what time is it in Japan?
It is 05:00 PM in Tokyo, Japan. Use the time field in the calculator above to check any other hour.
Is Japan ahead of or behind London?
Japan is ahead of London by 8 hours at the moment. In practical terms, the working day in Japan starts and ends earlier in London terms.
Do London and Japan observe daylight saving time?
London changes its clocks twice a year; Japan does not. The difference therefore shifts by an hour when London switches: across the year, Japan ranges from 8 hours ahead to 9 hours ahead relative to London.
What is the best time to call Japan from London?
Working hours overlap between 09:00 and 10:00 London time, which is 17:00 to 18:00 in Japan. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for London, United Kingdom (UTC+1) and Tokyo, Japan (UTC+9) were generated on Monday, August 31, 2026 UTC and refresh in your browser.