Best Meeting Time: London to Tokyo

London and Tokyo sit 8 hours apart during British Summer Time, leaving just one hour of shared working time each day. That single hour, 9am to 10am in London and 5pm to 6pm in Tokyo, is the entire window either side gets before someone is outside standard office hours. Getting the most from it requires planning well in advance.

Working Across London and Tokyo

The most active cross-city traffic between London and Tokyo comes from finance. London is Europe's largest financial centre, and Tokyo is Asia's. Fund managers, investment banks, and foreign-exchange desks in both cities trade instruments that span both markets, so calls between London and Tokyo are a daily operational reality for anyone working in asset management, fixed income, or equities with an Asia-Pacific book. Automotive supply chains also generate regular contact: Japanese manufacturers with European distribution or manufacturing operations depend on London-based teams for regulatory, legal, and commercial work. Similarly, pharmaceutical companies with R&D in one city and regulatory affairs in the other need structured weekly calls. Technology firms with engineering in Tokyo and product or commercial leadership in London face the same constraint. For all of these teams, the search for a meeting time usually starts with the same problem: Tokyo's working day is well under way before London has had its morning coffee, and by the time London is in full swing, Tokyo is wrapping up. Understanding the gap precisely, and where the one-hour overlap actually falls in each city's day, is what makes the difference between a meeting that works and one that keeps getting rescheduled.

Time Difference: London and Tokyo

Tokyo is currently 8 hours ahead of London. The live offsets are London UTC+1 and Tokyo UTC+9. London observes daylight saving and Tokyo does not, so the offset shifts twice a year if both sides aren't already aligned.

In standard time, Tokyo runs at UTC+9 and London at UTC+0, giving a 9-hour gap. During British Summer Time, London moves to UTC+1, which closes the gap to 8 hours. Japan does not observe daylight saving time at all, so Tokyo stays at UTC+9 year-round. That means when London clocks spring forward, the difference narrows from 9 hours to 8 hours, and the already thin overlap window actually gains one hour of shared working time. When London clocks fall back in late October, the gap widens again to 9 hours and the overlap disappears entirely: 9am in London is 6pm in Tokyo, just outside the standard working day. The UK changes its clocks in late March and late October. There is no equivalent transition in Japan, so the shift is entirely on London's side. Anyone with recurring weekly calls should audit those calendar invites the Monday after the UK clock change, because a call booked for a fixed UTC time will appear one hour later in London's local calendar from late October through to late March.

Best Times to Meet

The overlap between London and Tokyo covers one hour: 9am to 10am in London and 5pm to 6pm in Tokyo. This only applies during British Summer Time. In standard time (late October to late March), there is no in-hours overlap at all. Inside that one-hour window, the cleanest slot is typically 9am to 9:30am London time, which lands at 5pm to 5:30pm in Tokyo. This avoids the Tokyo team running into their end-of-day routine and gives the London side a chance to prepare before the rest of their morning fills up. Scheduling for 9:30am London risks pushing the Tokyo side to 5:30pm, and anything at 10am or later in London is 6pm or later in Tokyo, which is outside standard hours. Friday is the worst day to use this slot: the cultural notes for Tokyo indicate that Friday early evenings are typically reserved for team socialising, and meetings with international partners past 5pm on Fridays are rarely welcomed.

These conversions use the current UTC offset: London at UTC+1 (BST), Tokyo at UTC+9. 9am Monday in London = 5pm Monday in Tokyo. This is the usable overlap slot. 12pm (noon) Tuesday in London = 8pm Tuesday in Tokyo. Tokyo is outside standard working hours; this time works only with prior agreement from the Tokyo side. 5pm Wednesday in London = 1am Thursday in Tokyo. This is the middle of the night in Tokyo and should not be used for standard calls. During standard time (UTC+0 in London), each of these conversions shifts one hour later in London local time: the 9am BST slot becomes 8am GMT for the same 5pm Tokyo time.

Working Hours Overlap Explained

London operates on Europe/London (currently UTC+1). Tokyo operates on Asia/Tokyo (currently UTC+9). The table below maps a standard 9:00 AM–6:00 PM day in London to Tokyo's local time.

Tips for Scheduling Across London and Tokyo

• Book recurring London-Tokyo calls at 8am London time in winter to keep Tokyo at a workable 5pm rather than 6pm.
• Avoid scheduling any milestone calls in the last week of April: Tokyo's Golden Week closes most offices from 29 April through 5 May.
• The UK clock change in late October eliminates the working-hours overlap entirely; audit recurring invites the Monday after that weekend.
• Friday 5pm to 6pm Tokyo time is the one-hour overlap slot but is also prime socialising time for Tokyo teams; use it sparingly.
• 12pm London is 8pm Tokyo. Any call booked at noon or later in London requires explicit sign-off from the Tokyo team before it goes in the calendar.

Public Holidays and Working Weeks

London office culture defaults to a 9am to 5:30pm working day, with lunch typically between 12:30pm and 1:30pm. Finance teams in the City often run later, and informal meetings between 5pm and 6pm are not unusual in that sector. Fridays tend to wind down earlier, with many UK offices quieter by 4pm. Tokyo working days start strictly at 9am. Late evening working is less common than it once was, particularly among younger teams, and the expectation that Tokyo colleagues will take calls past 6pm should not be assumed. The most significant holiday block to plan around in Tokyo is Golden Week, running from 29 April to 5 May, during which most offices are closed for four to five days. Scheduling any major milestone calls or contract reviews in the last week of April is a reliable way to lose a week of progress. Tokyo also observes a New Year closure from 1 to 3 January. London's main fixed holidays are New Year's Day on 1 January, the May Bank Holiday on the first Monday in May, and Christmas Day on 25 December. The first Monday in May coincides with the tail end of Golden Week, making early May a period when both cities are running reduced schedules simultaneously.

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