The time difference between Tokyo and Ottawa is 13 hours. When it is 12:00 noon in Tokyo, it is 23:00 in Ottawa. Tokyo uses the Asia/Tokyo time zone (UTC+9), while Ottawa uses America/Toronto (UTC-4).
With a 13 hours gap, there is no standard business-hours overlap between Tokyo and Ottawa. One party will need to adjust their schedule. Early mornings in Tokyo or late evenings in Ottawa tend to be the most practical compromise.
Use this table to quickly convert any hour from Tokyo time to Ottawa time. Rows highlighted in green indicate overlapping business hours in both cities.
| Tokyo | Ottawa | |
|---|---|---|
| 00:00 | 11:00 (-1 day) | Night |
| 01:00 | 12:00 (-1 day) | Night |
| 02:00 | 13:00 (-1 day) | Night |
| 03:00 | 14:00 (-1 day) | Night |
| 04:00 | 15:00 (-1 day) | Night |
| 05:00 | 16:00 (-1 day) | Night |
| 06:00 | 17:00 (-1 day) | |
| 07:00 | 18:00 (-1 day) | |
| 08:00 | 19:00 (-1 day) | |
| 09:00 | 20:00 (-1 day) | |
| 10:00 | 21:00 (-1 day) | |
| 11:00 | 22:00 (-1 day) | |
| 12:00 | 23:00 (-1 day) | |
| 13:00 | 00:00 | |
| 14:00 | 01:00 | |
| 15:00 | 02:00 | |
| 16:00 | 03:00 | |
| 17:00 | 04:00 | |
| 18:00 | 05:00 | |
| 19:00 | 06:00 | |
| 20:00 | 07:00 | |
| 21:00 | 08:00 | |
| 22:00 | 09:00 | Night |
| 23:00 | 10:00 | Night |
Ottawa is currently observing daylight saving time, while Tokyo is on standard time. When Ottawa switches back to standard time, the difference between these two cities will shift by 1 hour.
The time difference is 13 hours. Ottawa is 13 hours behind Tokyo.
Yes. One of these cities observes DST while the other does not, so the difference shifts by 1 hour when DST begins or ends.
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 13 hours from Tokyo time to get Ottawa 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.