Osaka to Seattle Time Difference
Seattle is 16 hours behind Osaka. When it's 10:33:39 PM in Osaka, it's 06:33:39 AM in Seattle.
How Many Hours Behind Is Seattle From Osaka?
Seattle is 16 hours behind Osaka. So Osaka is 16 hours ahead of Seattle looking the other way — the same gap, described from the other end.
In practice that means a working day in Osaka starts when it is already 5:00 PM the previous day in Seattle. The gap is not fixed all year: it becomes 17 hours on Sunday, November 1, 2026, when Seattle changes its clocks.
Best Time to Call Osaka and Seattle
Standard 9-to-5 hours in Osaka and Seattle never overlap, so someone has to take the call outside their working day. The most workable window is 7:00 AM to 2:00 PM in Osaka, which is 3:00 PM to 10:00 PM in Seattle.
both at work Osaka only Seattle only neither — hours shown along the strip are Osaka local time.
Convert a Specific Time
Pick any date and time in Osaka to see the exact equivalent in Seattle.
Common Times Converted
Osaka time on the left, Seattle time on the right.
Osaka to Seattle: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Osaka. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Osaka | Seattle | Working hours |
|---|---|---|
| 12:00 AM | 8:00 AM prev day | — |
| 1:00 AM | 9:00 AM prev day | Seattle only |
| 2:00 AM | 10:00 AM prev day | Seattle only |
| 3:00 AM | 11:00 AM prev day | Seattle only |
| 4:00 AM | 12:00 PM prev day | Seattle only |
| 5:00 AM | 1:00 PM prev day | Seattle only |
| 6:00 AM | 2:00 PM prev day | Seattle only |
| 7:00 AM | 3:00 PM prev day | Seattle only |
| 8:00 AM | 4:00 PM prev day | Seattle only |
| 9:00 AM | 5:00 PM prev day | Osaka only |
| 10:00 AM | 6:00 PM prev day | Osaka only |
| 11:00 AM | 7:00 PM prev day | Osaka only |
| 12:00 PM | 8:00 PM prev day | Osaka only |
| 1:00 PM | 9:00 PM prev day | Osaka only |
| 2:00 PM | 10:00 PM prev day | Osaka only |
| 3:00 PM | 11:00 PM prev day | Osaka only |
| 4:00 PM | 12:00 AM | Osaka only |
| 5:00 PM | 1:00 AM | — |
| 6:00 PM | 2:00 AM | — |
| 7:00 PM | 3:00 AM | — |
| 8:00 PM | 4:00 AM | — |
| 9:00 PM | 5:00 AM | — |
| 10:00 PM | 6:00 AM | — |
| 11:00 PM | 7:00 AM | — |
Understanding the Osaka – Seattle Time Difference
Osaka runs on Asia/Tokyo, currently JST (UTC+9:00). Seattle runs on America/Los_Angeles, currently PDT (UTC-7:00). The gap of 16 hours is simply the distance between those two offsets.
Seattle observes Daylight Saving Time and Osaka does not, so the gap between them shifts by an hour twice a year. The next shift is on Sunday, November 1, 2026, when Seattle adjusts its clocks and the difference becomes 17 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in Japan · Daylight Saving Time in the United States.
Osaka today
Seattle today
Frequently Asked Questions
What is the time difference between Osaka and Seattle?
Seattle is currently 16 hours behind Osaka. That gap becomes 17 hours on Sunday, November 1, 2026, when Seattle changes its clocks.
How many hours behind is Seattle from Osaka?
Seattle is 16 hours behind Osaka. Looking at it the other way, Osaka is 16 hours ahead of Seattle.
What time is it in Seattle when it is 9:00 AM in Osaka?
When it is 9:00 AM in Osaka, it is 5:00 PM the previous day in Seattle.
Is Seattle ahead of or behind Osaka?
Seattle is 16 hours behind Osaka. Osaka reaches each point in the day first, so Seattle is still getting started while the Osaka working day is finishing.
What is the best time to call between Osaka and Seattle?
Standard business hours in Osaka and Seattle do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 7:00 AM to 2:00 PM in Osaka, which is 3:00 PM to 10:00 PM in Seattle.
Does the time difference between Osaka and Seattle change during the year?
Yes. Seattle observes Daylight Saving Time and Osaka does not, so the gap between them shifts during the year. It changes to 17 hours on Sunday, November 1, 2026.
What time zones are Osaka and Seattle in?
Osaka uses the Asia/Tokyo time zone, currently JST (UTC+9:00). Seattle uses America/Los_Angeles, currently PDT (UTC-7:00).