Time Difference Between Japan and Alaska Time
As of 31 August 2026, Alaska Time is 17 hours behind Japan. That number is not constant. Over the course of a year, because of daylight saving changes, Alaska Time, United States ranges from 18 hours behind to 17 hours behind relative to Tokyo, Japan. The calculator below is always up to date.
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Tokyo, Japan
07:34
Tue, Sep 1, 2026
UTC+9 · Asia/Tokyo
Alaska Time, United States
-17h14:34
Mon, Aug 31, 2026
UTC-8 · AKDT · America/Anchorage
Alaska Time is 17 hours behind Japan.
When it is 07:34 in Japan, it is already the previous day in Alaska Time.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| Japan | Tuesday, September 1, 2026 | Asia/Tokyo | UTC+9 | Not observed |
| Alaska Time | Monday, August 31, 2026 | AKDTAmerica/Anchorage | UTC-8 | Active now |
Alaska Time: Covers all of Alaska. Switches between AKST (UTC-9) and AKDT (UTC-8) with daylight saving.
Hour by hour: Japan to Alaska Time
Every hour of today in Japan and what it is in Alaska Time. Highlighted rows fall inside Alaska Time working hours (09:00–18:00).
| Japan | Alaska Time |
|---|---|
| 00:00 | 07:00prev day |
| 01:00 | 08:00prev day |
| 02:00 | 09:00prev day |
| 03:00 | 10:00prev day |
| 04:00 | 11:00prev day |
| 05:00 | 12:00prev day |
| 06:00 | 13:00prev day |
| 07:00 | 14:00prev day |
| 08:00 | 15:00prev day |
| 09:00 | 16:00prev day |
| 10:00 | 17:00prev day |
| 11:00 | 18:00prev day |
| Japan | Alaska Time |
|---|---|
| 12:00 | 19:00prev day |
| 13:00 | 20:00prev day |
| 14:00 | 21:00prev day |
| 15:00 | 22:00prev day |
| 16:00 | 23:00prev day |
| 17:00 | 00:00 |
| 18:00 | 01:00 |
| 19:00 | 02:00 |
| 20:00 | 03:00 |
| 21:00 | 04:00 |
| 22:00 | 05:00 |
| 23:00 | 06:00 |
Best time to call or meet
Overlapping working hours
09:00–11:00 in Japan (16:00–18:00 in Alaska Time)
Both places are inside 09:00–18:00 for 2 hours a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
08:00–14:00 in Japan (15:00–21:00 in Alaska Time)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
Alaska Time puts its clocks back on Sunday, November 1, 2026
The local offset moves from UTC-8 to UTC-9. After that date, Alaska Time is 18 hours behind Japan — instead of 17 hours behind, as it is today.
Planning something with more than two places?
Adding a third city usually kills the obvious answer. The Meeting Time Finder takes up to five cities at once and shows only the hours that work for everybody.
Japan and Alaska Time: common questions
What is the time difference between Japan and Alaska Time?
As of 31 August 2026, Alaska Time is 17 hours behind Japan. The gap is not fixed: across the year, Alaska Time ranges from 18 hours behind to 17 hours behind relative to Japan, as clocks change. The calculator on this page always shows the difference for right now.
When it is 9:00 AM in Japan, what time is it in Alaska Time?
It is 04:00 PM in Alaska Time, United States. Use the time field in the calculator above to check any other hour.
Is Alaska Time ahead of or behind Japan?
Alaska Time is behind Japan by 17 hours at the moment. In practical terms, the working day in Alaska Time starts and ends later in Japan terms.
Do Japan and Alaska Time observe daylight saving time?
Alaska Time changes its clocks twice a year; Japan does not. The difference therefore shifts by an hour when Alaska Time switches: across the year, Alaska Time ranges from 18 hours behind to 17 hours behind relative to Japan.
What is the best time to call Alaska Time from Japan?
Working hours overlap between 09:00 and 11:00 Japan time, which is 16:00 to 18:00 in Alaska Time. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for Tokyo, Japan (UTC+9) and Alaska Time, United States (UTC-8) were generated on Monday, August 31, 2026 UTC and refresh in your browser.