London to Tokyo: best time to call
London and Tokyo have a substantial time difference, so the easiest call windows usually sit near the edge of one person’s day. These clocks show the current local time in both cities. For an actual meeting, use the planner to get a suggested one hour overlap rather than guessing from the time difference alone.
Why the gap can change: Japan does not currently use daylight saving time, while the UK does. That means the London–Tokyo difference changes when the UK moves between GMT and British Summer Time.
How to choose a practical call time
Start with the hours when both people are realistically available, not simply awake. For work meetings, that usually means protecting normal office hours where possible. For personal calls, early evening can be fine, but pushing someone close to bedtime every week gets old quickly.
When there is no perfect overlap, rotate the inconvenience. One call can lean earlier for London; the next can lean later. That is usually fairer than forcing the same person to take every awkward slot.
Use the live planner for the current answer
A static time difference chart can become wrong when daylight saving rules change. Best Time To Talk checks the live time zone data in your browser and ranks practical one hour windows for the cities you select.
Compare London and Tokyo