London → Tokyo Time Converter

Convert London (GMT/BST) to Tokyo (JST) and multiple destinations. Choose City/IANA/Abbreviation mode, use Live or Custom time, pick display formats, and copy exact formatted times for calendar invites.

Pick selection mode
Choose City, IANA or Abbreviation mode. Select one origin (London) and one or more destinations (Tokyo + others).
Live clocks or custom time
Toggle Live mode for ticking destination clocks or enter a custom origin time (past/future) to convert across destinations.
Choose display formats
Select the output format(s) you prefer (24h, 12h, ISO, full date, or a custom format) for all destination boxes.
Copy, swap, info & jet-lag
Use quick actions to copy formatted times, swap origin/destination, open DST info for any timezone, or jump to the jet-lag planner.

Advanced Features

One → Many conversions Convert a single London time (live or custom) into multiple destination times in one unified view.
Flexible output formats Show results in any supported display format and copy the exact string your team or calendar requires.

Practical Scheduling Tips

How far ahead is Tokyo?
Tokyo (JST) is UTC+9 and does not use DST. London is UTC+0 (GMT) in winter and UTC+1 (BST) in summer — so Tokyo is 9 hours ahead in GMT and 8 hours ahead in BST.
Best workable window (recommended)
Morning London meetings work best for Tokyo evenings. Example: London 08:00–10:00 → Tokyo 16:00–19:00 (Tokyo = London+9 when London is GMT; London+8 when BST — check DST with Info).
Cross-date clarity
Because Tokyo is ahead, the converted time may fall on the next calendar day. Always show both local date + time in invites (e.g., “Mon 08:00 LON / Mon 17:00 TYO” or “Mon 08:00 LON / Tue 00:00 TYO”).
When to use Live vs Custom
Use Live mode for real-time monitoring (ops, launches). Use Custom mode to propose future slots and copy many formatted times into an invite at once.

FAQs

Why do converted times sometimes shift by one hour?

London observes British Summer Time (BST), which moves London +1 hour. The converter applies live tzdb offsets — use the Info button on a destination to see current DST status and exact offsets.

Will Tokyo’s time ever change seasonally?

No—Tokyo uses Japan Standard Time (JST, UTC+9) year-round and does not observe DST. That makes Tokyo’s offset stable; London’s offset can shift by one hour due to BST.

How should I format invites for clarity?

Include both local timestamps and the timezone abbreviation (e.g., “08:00 BST / 16:00 JST”) and attach a link to the converter so attendees can confirm their local time.

Other London and Tokyo Timezone Conversions

How It Works

Accepts one origin and multiple destinations in City, IANA, or Abbreviation mode.
Uses tzdb to apply current offsets (London may be GMT or BST; Tokyo is JST = UTC+9).
In Live mode destination clocks tick in real time; Custom mode converts a static origin time across destinations.
Destination cards include formatted date/time, timezone label, a human-friendly time-slot, and quick actions (Swap, Copy, Info, Jet-Lag).

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