Tokyo is currently 16 hours ahead of San Francisco. San Francisco is on UTC-7 and Tokyo is on UTC+9.
Because San Francisco and Tokyo do not start and end daylight saving time together, the gap between them is not constant. Over the next twelve months it takes 2 different values.
| San Francisco | Tokyo |
|---|---|
| 12:00 AM | 4:00 PM |
| 1:00 AM | 5:00 PM |
| 2:00 AM | 6:00 PM |
| 3:00 AM | 7:00 PM |
| 4:00 AM | 8:00 PM |
| 5:00 AM | 9:00 PM |
| 6:00 AM | 10:00 PM |
| 7:00 AM | 11:00 PM |
| 8:00 AM | 12:00 AM (next day) |
| 9:00 AM | 1:00 AM (next day) |
| 10:00 AM | 2:00 AM (next day) |
| 11:00 AM | 3:00 AM (next day) |
| 12:00 PM | 4:00 AM (next day) |
| 1:00 PM | 5:00 AM (next day) |
| 2:00 PM | 6:00 AM (next day) |
| 3:00 PM | 7:00 AM (next day) |
| 4:00 PM | 8:00 AM (next day) |
| 5:00 PM | 9:00 AM (next day) |
| 6:00 PM | 10:00 AM (next day) |
| 7:00 PM | 11:00 AM (next day) |
| 8:00 PM | 12:00 PM (next day) |
| 9:00 PM | 1:00 PM (next day) |
| 10:00 PM | 2:00 PM (next day) |
| 11:00 PM | 3:00 PM (next day) |
| San Francisco | Tokyo |
|---|---|
| 12:00 AM | 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 | 12:00 AM (next day) |
| 8:00 AM | 1:00 AM (next day) |
| 9:00 AM | 2:00 AM (next day) |
| 10:00 AM | 3:00 AM (next day) |
| 11:00 AM | 4:00 AM (next day) |
| 12:00 PM | 5:00 AM (next day) |
| 1:00 PM | 6:00 AM (next day) |
| 2:00 PM | 7:00 AM (next day) |
| 3:00 PM | 8:00 AM (next day) |
| 4:00 PM | 9:00 AM (next day) |
| 5:00 PM | 10:00 AM (next day) |
| 6:00 PM | 11:00 AM (next day) |
| 7:00 PM | 12:00 PM (next day) |
| 8:00 PM | 1:00 PM (next day) |
| 9:00 PM | 2:00 PM (next day) |
| 10:00 PM | 3:00 PM (next day) |
| 11:00 PM | 4:00 PM (next day) |
Taking a working day of 9:00 AM to 6:00 PM on both sides, the overlap in San Francisco local time is 5:00 PM to 6:00 PM, which is 9:00 AM onward in Tokyo.
Tokyo is 16 hours ahead of San Francisco right now. That gap is not constant through the year, because the two places change their clocks on different dates.
9:00 AM in San Francisco is 1:00 AM the next day in Tokyo.
Assuming a 9:00 AM to 6:00 PM working day on both sides, the overlap in San Francisco local time is 5:00 PM to 6:00 PM.
For the current time on its own, with the daylight saving dates that apply and the working week in that country, see time in San Francisco or time in Tokyo.