What is the time difference between Tokyo and London?

Tokyo (JST, UTC+9) is 9 hours ahead of London in winter (GMT, UTC+0) and 8 hours ahead in summer (BST, UTC+1). Japan does not observe Daylight Saving Time, so the offset changes only when the UK shifts its clocks in spring and autumn.

Does Tokyo observe Daylight Saving Time?

No. Japan abolished DST in 1952 and has not used it since. Tokyo stays on JST (UTC+9) all year. Only London shifts its clocks, which is why the Tokyo-London gap alternates between 9 and 8 hours.

When does the offset change from 9 to 8 hours?

The UK moves clocks forward on the last Sunday in March at 01:00 GMT, entering BST (UTC+1). At that point Tokyo goes from 9 hours ahead to 8 hours ahead. The gap returns to 9 hours on the last Sunday in October at 02:00 BST when the UK reverts to GMT.

What are the best meeting times when calling from Tokyo to London?

The overlap between standard business hours (09:00–18:00) is narrow. Tokyo at 17:00–18:00 JST corresponds to London at 08:00–09:00 GMT — the very start of the London workday. That window is the most realistic option for a joint call.

Is this tool accurate for scheduling?

Yes. It uses the IANA timezone database embedded in your browser — the same source used by operating systems and calendar apps worldwide. Accuracy depends on your device clock being synchronized via NTP, which most devices do automatically.

JST stands for Japan Standard Time. It is UTC+9, used across all of Japan year-round. There is no Japan Daylight Saving Time designation because Japan does not observe DST.

Time Difference: Tokyo to London

See the current time in Tokyo and London side by side, with the fixed UTC offset (JST is UTC+9, London is GMT or BST), updated live every second.

Tokyo, Japan

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JST UTC+9

London, United Kingdom

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GMT UTC+0

Current Offset

+9 hours

Tokyo is 9 hours ahead of London

Convert Tokyo Time to London Time

Based on the current offset — updates automatically

Tokyo (JST)	London (GMT/BST)

Meeting Overlap Finder

Business hours (09:00–18:00) highlighted — best overlap shaded

Tokyo (JST)	London (GMT/BST)	Status

Summary

This tool displays the live current time in both Tokyo (Asia/Tokyo — JST, UTC+9 year-round, no DST) and London (Europe/London — GMT in winter, BST in summer) side by side. Tokyo never observes Daylight Saving Time, so the offset between the two cities shifts twice a year: Tokyo is 9 hours ahead of London in winter (GMT) and 8 hours ahead in summer (BST). Use this tool to schedule calls from Japan to the UK, coordinate remote teams, or plan Asia-Europe meetings.

How it works

Your browser reads the current moment from your device clock.
It converts that moment to Asia/Tokyo time (JST, UTC+9) using the IANA timezone database built into modern browsers.
The same moment is converted to Europe/London time (GMT or BST depending on the season).
The UTC offsets of both cities are compared to calculate the exact hour difference.
All three values — Tokyo time, London time, and the offset — refresh every second.
When London switches between GMT and BST, the displayed offset adjusts automatically from +9 to +8 hours.

Use cases

Scheduling video calls between Tokyo and London offices.
Checking if a colleague in London is still at their desk.
Planning Japan-UK travel and arrival time comparisons.
Remote teams coordinating daily standups across Japan and the UK.
Finding overlapping business hours for Tokyo-London meetings.
Converting a Tokyo meeting time to its London equivalent.
Journalists in Tokyo checking broadcast times for live UK events.
Students and teachers arranging online lessons between Japan and the UK.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu