The time difference between Tokyo and San Diego is 17 hours. When it is 12:00 noon in Tokyo, it is 19:00 in San Diego. Tokyo uses the Asia/Tokyo time zone (UTC+9), while San Diego uses America/Los_Angeles (UTC-8).
With a 17 hours gap, there is no standard business-hours overlap between Tokyo and San Diego. One party will need to adjust their schedule. Early mornings in Tokyo or late evenings in San Diego tend to be the most practical compromise.
Use this table to quickly convert any hour from Tokyo time to San Diego time. Rows highlighted in green indicate overlapping business hours in both cities.
| Tokyo | San Diego | |
|---|---|---|
| 00:00 | 07:00 (-1 day) | Night |
| 01:00 | 08:00 (-1 day) | Night |
| 02:00 | 09:00 (-1 day) | Night |
| 03:00 | 10:00 (-1 day) | Night |
| 04:00 | 11:00 (-1 day) | Night |
| 05:00 | 12:00 (-1 day) | Night |
| 06:00 | 13:00 (-1 day) | |
| 07:00 | 14:00 (-1 day) | |
| 08:00 | 15:00 (-1 day) | |
| 09:00 | 16:00 (-1 day) | Overlap |
| 10:00 | 17:00 (-1 day) | |
| 11:00 | 18:00 (-1 day) | |
| 12:00 | 19:00 (-1 day) | |
| 13:00 | 20:00 (-1 day) | |
| 14:00 | 21:00 (-1 day) | |
| 15:00 | 22:00 (-1 day) | |
| 16:00 | 23:00 (-1 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 | Night |
| 23:00 | 06:00 | Night |
Neither Tokyo nor San Diego is currently observing daylight saving time. If either city observes DST, the time difference will change by 1 hour when DST begins or ends. Always double-check before scheduling across these time zones during March–April and October–November.
The time difference is 17 hours. San Diego is 17 hours behind Tokyo.
It can. If either Tokyo or San Diego observes daylight saving time, the gap will shift by 1 hour during the transition periods (typically March–April and October–November).
There is no ideal window during standard business hours. Consider scheduling at the edges — early morning for the city that is ahead and late afternoon for the city that is behind.
Subtract 17 hours from Tokyo time to get San Diego time. Use the hour-by-hour table above for a quick reference.
For sunrise and sunset data, visit TheSunsetTimes.com. For detailed DST schedules, see DaylightSavingTime.info.