London to Tokyo
+9hLondon
GMTSOURCETokyo
JSTGreen rows indicate typical business hours (9 AM - 5 PM)
GMT and JST on the World Map
The map below highlights the GMT (Greenwich Mean Time) and JST (Japan Standard Time) timezone regions across the globe.
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
JST – Japan Standard Time
UTC+09:00Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.
- •Japan does not observe daylight saving time.
- •Tokyo is the most populous metropolitan area in the world.
- •The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
- •JST is 14 hours ahead of EST and 9 hours ahead of GMT.
About London
WikipediaLondon, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
Big Ben is actually the name of the bell inside the Elizabeth Tower, not the tower itself.
About Tokyo
WikipediaTokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.
Japan does not observe daylight saving time, making JST consistent year-round.
Everything You Need to Know About London and Tokyo Time
London, UK operates on the Greenwich Mean Time (UTC+00:00). Tokyo, Japan uses Japan Standard Time (UTC+09:00).
The time difference between London and Tokyo is 540 minutes (+9h). When it's noon in London, it's 09:00 PM in Tokyo.
Why Convert London to Tokyo Time?
Whether you're traveling from London to Tokyo or simply need to coordinate across time zones, understanding the 9-hour difference is key. Use this converter to quickly determine the current time in Tokyo and ensure your schedule aligns perfectly.
Remember: Daylight Saving Time changes can affect the time difference between London and Tokyo. Always double-check the current offset before scheduling important events.
About GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
About JST (Japan Standard Time)
Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.
Best Time to Call Between London and Tokyo
If you want to reach someone in Tokyo during standard business hours (9 AM – 5 PM JST), the best time to call from London would be:
- Tokyo 9:00 AM = London 12:00 AM
- Tokyo 12:00 PM = London 03:00 AM
- Tokyo 5:00 PM = London 08:00 AM
Business Hours Overlap
London and Tokyo have minimal business hours overlap due to the +9h time difference. Teams may need to schedule early morning or late evening meetings for real-time collaboration.
In summary, the +9h time difference between London and Tokyo means you need to plan carefully. Use this page as your go-to reference for quick and accurate time conversions.
🕐 Daylight Saving Time Info
London
❄ Currently in Standard Time
Standard: UTC+00:00 · DST: UTC+01:00
Clocks spring forward on Sun, Mar 29, 2026
Tokyo
Does not observe DST
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between London and Tokyo?
Tokyo is +9h from London.
What timezone is London in?
London, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
What timezone is Tokyo in?
Tokyo operates on Japan Standard Time (JST), which is 14 hours ahead of New York. As Asia's largest financial hub, Tokyo trading hours are crucial for global markets.
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
What are the business hours in Tokyo?
Standard business hours in Tokyo are 9:00 AM - 6:00 PM JST.
What is the best time to schedule a call between London and Tokyo?
The best overlap for a call is when both cities are in business hours. London works 9:00 AM - 5:00 PM GMT and Tokyo works 9:00 AM - 6:00 PM JST (+9h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in London and Tokyo?
London uses GBP (£) while Tokyo uses JPY (¥). Check current exchange rates when planning travel or business between these cities.
How do London and Tokyo compare in size?
London has a population of approximately 8.8 million (metro: 14.8 million), while Tokyo has approximately 14 million (metro: 37.4 million).
What are the major landmarks in London and Tokyo?
London is known for Big Ben, Tower Bridge, Buckingham Palace. Tokyo is famous for Tokyo Tower, Shibuya Crossing, Senso-ji Temple.
Do London and Tokyo have stock exchanges?
Yes. London has the LSE (London Stock Exchange) and Tokyo has the TSE (Tokyo Stock Exchange). The +9h time difference affects trading hour overlaps between these exchanges.
Which countries use GMT (Greenwich Mean Time)?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.
Does GMT observe daylight saving time?
Yes, GMT switches to BST during summer months.
What are some interesting facts about GMT?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
Which cities are in the JST timezone?
Major cities in the JST timezone include Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka.
What is the UTC offset for JST?
Japan Standard Time (JST) is at UTC+09:00.
What should I know about the JST timezone?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
When is it midnight in London, what time is it in Tokyo?
When it is 12:00 AM (midnight) in London (GMT), it is +9h later in Tokyo (JST).
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