Time difference between Tokyo and Hong Kong
Hong Kong is 1 hour behind Tokyo.
Right now it is in Tokyo
and in Hong Kong.
When it is 12:00 noon in Tokyo, it is 11:00 AM in Hong Kong.
Tokyo GMT+9 · UTC+9 
Hong Kong GMT+8 · UTC+8 Difference 1 hour — Hong Kong is behind Tokyo
Best time to call
Both in office hours (9–17) Both awake (7–22) One side asleep
Hours shown in Tokyo time. The working-day overlap runs 10:00 AM – 5:00 PM in Tokyo, which is 9:00 AM – 4:00 PM in Hong Kong — schedule calls in that window.
Hour-by-hour conversion
| Tokyo (GMT+9) | Hong Kong (GMT+8) | Call quality |
|---|---|---|
| 12:00 AM | 11:00 PM−1 day | Off hours |
| 1:00 AM | 12:00 AM | Off hours |
| 2:00 AM | 1:00 AM | Off hours |
| 3:00 AM | 2:00 AM | Off hours |
| 4:00 AM | 3:00 AM | Off hours |
| 5:00 AM | 4:00 AM | Off hours |
| 6:00 AM | 5:00 AM | Off hours |
| 7:00 AM | 6:00 AM | Off hours |
| 8:00 AM | 7:00 AM | OK |
| 9:00 AM | 8:00 AM | OK |
| 10:00 AM | 9:00 AM | Best |
| 11:00 AM | 10:00 AM | Best |
| 12:00 PM | 11:00 AM | Best |
| 1:00 PM | 12:00 PM | Best |
| 2:00 PM | 1:00 PM | Best |
| 3:00 PM | 2:00 PM | Best |
| 4:00 PM | 3:00 PM | Best |
| 5:00 PM | 4:00 PM | OK |
| 6:00 PM | 5:00 PM | OK |
| 7:00 PM | 6:00 PM | OK |
| 8:00 PM | 7:00 PM | OK |
| 9:00 PM | 8:00 PM | OK |
| 10:00 PM | 9:00 PM | Off hours |
| 11:00 PM | 10:00 PM | Off hours |
Daylight saving time note
The difference between Tokyo and Hong Kong stays at 1 hour all year — their clock changes (if any) line up, so no week of the year shifts the gap.
Why the time difference exists
Tokyo keeps standard time at UTC+9, while Hong Kong runs on UTC+8. That difference stays constant whatever the season. Hong Kong sits roughly 2,900 km to the southwest of Tokyo.
Expect roughly a 1 hour backward adjustment travelling from Tokyo to Hong Kong. The direct distance works out to roughly 4 hours in the air. Line up a shared window before you call and the rest is easy.
