Tokyo to San Francisco Time Difference
San Francisco is 16 hours behind Tokyo. When it's 01:30:08 AM in Tokyo, it's 09:30:08 AM in San Francisco.
How Many Hours Behind Is San Francisco From Tokyo?
San Francisco is 16 hours behind Tokyo. So Tokyo 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 Tokyo 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 Tokyo and San Francisco
Standard 9-to-5 hours in Tokyo 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 Tokyo, which is 3:00 PM to 10:00 PM in San Francisco.
both at work Tokyo only San Francisco only neither — hours shown along the strip are Tokyo local time.
Convert a Specific Time
Pick any date and time in Tokyo to see the exact equivalent in San Francisco.
Common Times Converted
Tokyo time on the left, San Francisco time on the right.
Tokyo to San Francisco: Full 24-Hour Conversion Table
Based on today, Monday, October 12, 2026 in Tokyo. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Tokyo | 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 | Tokyo only |
| 10:00 AM | 6:00 PM prev day | Tokyo only |
| 11:00 AM | 7:00 PM prev day | Tokyo only |
| 12:00 PM | 8:00 PM prev day | Tokyo only |
| 1:00 PM | 9:00 PM prev day | Tokyo only |
| 2:00 PM | 10:00 PM prev day | Tokyo only |
| 3:00 PM | 11:00 PM prev day | Tokyo only |
| 4:00 PM | 12:00 AM | Tokyo 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 Tokyo – San Francisco Time Difference
Tokyo 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 Tokyo 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.
Tokyo today
San Francisco today
Frequently Asked Questions
What is the time difference between Tokyo and San Francisco?
San Francisco is currently 16 hours behind Tokyo. That gap becomes 17 hours on Sunday, November 1, 2026, when San Francisco changes its clocks.
How many hours behind is San Francisco from Tokyo?
San Francisco is 16 hours behind Tokyo. Looking at it the other way, Tokyo is 16 hours ahead of San Francisco.
What time is it in San Francisco when it is 9:00 AM in Tokyo?
When it is 9:00 AM in Tokyo, it is 5:00 PM the previous day in San Francisco.
Is San Francisco ahead of or behind Tokyo?
San Francisco is 16 hours behind Tokyo. Tokyo reaches each point in the day first, so San Francisco is still getting started while the Tokyo working day is finishing.
What is the best time to call between Tokyo and San Francisco?
Standard business hours in Tokyo 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 Tokyo, which is 3:00 PM to 10:00 PM in San Francisco.
Does the time difference between Tokyo and San Francisco change during the year?
Yes. San Francisco observes Daylight Saving Time and Tokyo 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 Tokyo and San Francisco in?
Tokyo uses the Asia/Tokyo time zone, currently JST (UTC+9:00). San Francisco uses America/Los_Angeles, currently PDT (UTC-7:00).