Osaka to San Francisco Time Difference
San Francisco is 16 hours behind Osaka. When it's 10:34:26 PM in Osaka, it's 06:34:26 AM in San Francisco.
How Many Hours Behind Is San Francisco From Osaka?
San Francisco is 16 hours behind Osaka. So Osaka is 16 hours ahead of San Francisco 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 San Francisco. The gap is not fixed all year: it becomes 17 hours on Sunday, November 1, 2026, when San Francisco changes its clocks.
Best Time to Call Osaka and San Francisco
Standard 9-to-5 hours in Osaka and San Francisco 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 San Francisco.
both at work Osaka only San Francisco 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 San Francisco.
Common Times Converted
Osaka time on the left, San Francisco time on the right.
Osaka to San Francisco: 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 | San Francisco | Working hours |
|---|---|---|
| 12:00 AM | 8:00 AM prev day | — |
| 1:00 AM | 9:00 AM prev day | San Francisco only |
| 2:00 AM | 10:00 AM prev day | San Francisco only |
| 3:00 AM | 11:00 AM prev day | San Francisco only |
| 4:00 AM | 12:00 PM prev day | San Francisco only |
| 5:00 AM | 1:00 PM prev day | San Francisco only |
| 6:00 AM | 2:00 PM prev day | San Francisco only |
| 7:00 AM | 3:00 PM prev day | San Francisco only |
| 8:00 AM | 4:00 PM prev day | San Francisco 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 – San Francisco Time Difference
Osaka runs on Asia/Tokyo, currently JST (UTC+9:00). San Francisco runs on America/Los_Angeles, currently PDT (UTC-7:00). The gap of 16 hours is simply the distance between those two offsets.
San Francisco 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 San Francisco 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
San Francisco today
Frequently Asked Questions
What is the time difference between Osaka and San Francisco?
San Francisco is currently 16 hours behind Osaka. That gap becomes 17 hours on Sunday, November 1, 2026, when San Francisco changes its clocks.
How many hours behind is San Francisco from Osaka?
San Francisco is 16 hours behind Osaka. Looking at it the other way, Osaka is 16 hours ahead of San Francisco.
What time is it in San Francisco 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 San Francisco.
Is San Francisco ahead of or behind Osaka?
San Francisco is 16 hours behind Osaka. Osaka reaches each point in the day first, so San Francisco is still getting started while the Osaka working day is finishing.
What is the best time to call between Osaka and San Francisco?
Standard business hours in Osaka and San Francisco 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 San Francisco.
Does the time difference between Osaka and San Francisco change during the year?
Yes. San Francisco 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 San Francisco in?
Osaka uses the Asia/Tokyo time zone, currently JST (UTC+9:00). San Francisco uses America/Los_Angeles, currently PDT (UTC-7:00).