Japan uses a single time zone, and this guide covers them all: the offset in each city, the daylight saving dates, the best time to call from New York or London, and how to convert any time. The 2 major cities covered here are Tokyo, Osaka.

Try the tool: World Clock — see the current time in every city in Japan, with the date and the offset.

Time zones in Japan

City IANA time zone Offset in January 2026 Offset in July 2026 Daylight saving?
Tokyo Asia/Tokyo UTC+09:00 UTC+09:00 No
Osaka Asia/Tokyo UTC+09:00 UTC+09:00 No

With one time zone, Japan is simple: the whole country is on Asia/Tokyo, UTC+09:00 from UTC all year. There is no internal time difference to worry about — a meeting scheduled for 10am in Tokyo is 10am everywhere in the country. The only question is the difference from the rest of the world, and the table above gives it for January and July.

Daylight saving in Japan

None of the cities covered here observes daylight saving — Japan stays on the same offset all year. Tokyo: Japan last observed daylight saving in 1951, during the post-war occupation, and has not used it since. There is a recurring public debate about bringing it back, but no law has passed. Osaka: Japan last observed daylight saving in 1951, during the post-war occupation, and has not used it since. There is a recurring public debate about bringing it back, but no law has passed. The advantage is simplicity: the offset you learn is the offset all year, and a meeting scheduled in January is at the same time in July.

What time is it in Japan when it is 12:00 UTC?

City Local time at 12:00 UTC (15 January 2026)
Tokyo 9:00 pm
Osaka 9:00 pm

How to convert a time to Japan

Take 3pm in London. In January, London is UTC+00:00 and Tokyo is UTC+09:00, so 3pm in London is 12:00 am in Tokyo. In July, London is UTC+01:00 and Tokyo is UTC+09:00, so 3pm in London is 11:00 pm in Tokyo. The answer is the same in July as in January, because neither place changes its offset — Tokyo does not observe daylight saving. The time zone converter does this for any two cities and any date, and the UTC converter converts from UTC.

The best time to call Japan

The overlap of a 9am–5pm working day between Tokyo and New York is none in January 2026; between Tokyo and London it is none. There is no overlap with either city in a normal working day, so a call has to be early morning or late evening for someone — the kindest time is usually early morning in the city further east.

The time in Japan through the year

The offset of Tokyo month by month in 2026 — the local time when it is 12:00 UTC on the 15th of each month:

Month UTC offset Local time at 12:00 UTC
January UTC+09:00 9:00 pm
February UTC+09:00 9:00 pm
March UTC+09:00 9:00 pm
April UTC+09:00 9:00 pm
May UTC+09:00 9:00 pm
June UTC+09:00 9:00 pm
July UTC+09:00 9:00 pm
August UTC+09:00 9:00 pm
September UTC+09:00 9:00 pm
October UTC+09:00 9:00 pm
November UTC+09:00 9:00 pm
December UTC+09:00 9:00 pm

Tokyo stays on the same offset all twelve months, because it does not observe daylight saving — the table is the same in January and in July, and there is no clock change to remember. The world clock for Tokyo shows the live time and the offset in effect today.

Japan and the rest of the world

The time difference from Tokyo to six major cities, in January and in July 2026:

City Difference in January Difference in July
New York 14 hours ahead 13 hours ahead
London 9 hours ahead 8 hours ahead
Paris 8 hours ahead 7 hours ahead
Tokyo the same time the same time
Sydney 2 hours behind 1 hour behind
Dubai 5 hours ahead 5 hours ahead

The differences change between January and July wherever one of the two cities observes daylight saving and the other does not — or wherever they change on different dates. The time zone converter gives the difference for any date, so a conversion done for January is not reused for July without checking.

Calling Japan from London

In January there is no overlap between the working hours of Tokyo and London, so any call has to be early morning or late evening for one side. The kindest time is usually early morning in the city further east — 8am there is late evening the previous day in the other city — or late evening in the city further west. The meeting planner shows the overlap for any set of cities.

Neighbouring time zones

Other major cities in Asia, for comparison:

City Country Offset in January 2026
Dubai United Arab Emirates UTC+04:00
Singapore Singapore UTC+08:00
Mumbai India UTC+05:30
Hong Kong Hong Kong UTC+08:00
Shanghai China UTC+08:00
Seoul South Korea UTC+09:00
Bangkok Thailand UTC+07:00
Beijing China UTC+08:00

Frequently asked questions

How many time zones does Japan have?

One: the whole country is on Asia/Tokyo. The table above gives the offset for each city in January and July.

What is the time zone of Tokyo?

Tokyo is on Asia/Tokyo, UTC+09:00 from UTC in January and UTC+09:00 in July. The world clock for Tokyo shows the live time.

Does Japan observe daylight saving?

No — none of the cities covered here observes daylight saving, so the offset is the same all year.

What time is it in Tokyo when it is 12:00 UTC?

9:00 pm on 15 January 2026 — Tokyo is UTC+09:00 from UTC in winter.

What is the best time to call Japan from London?

The overlap of working hours between Tokyo and London is none in January. Mid-morning in the city further east is usually the kindest time — use the meeting planner to check.

How do I convert a time to Japan?

Find the offset for the city and the date — the table above gives January and July — and add it to the UTC time, or use the time zone converter to convert between any two cities directly.

Related pages

Sources

  • IANA Time Zone Database, via Node.js Intl (Intl.DateTimeFormat with timeZone) — offsets, daylight saving dates and local times in this article were worked out from the IANA database, not typed from memory.
  • TimeFlow's own time-zone data (data/cities.ts, data/dst.ts), computed from the IANA database.
  • Time zone rules and offsets: the IANA Time Zone Database, as applied by this site's tools. Offsets and daylight saving dates on this page are computed from the database for the dates stated.
  • TimeFlow's world clock and time zone converter — the live tools behind the numbers on this page.
  • Time-zone and daylight saving rules are set by governments and can change. For flights, deadlines and meetings that cannot move, confirm the time with an official source.