Hong Kong zone
GMT+8 (GMT+8)
Tokyo zone
GMT+9 (GMT+9)
Difference
1 hour ahead of Hong Kong
Business overlap
7h (9-5 windows)
Working hours overlap
Each cell is one hour in Hong Kong. Filled cells mark when 9 AM – 5 PM in Hong Kong and Tokyo both apply.
7 hours per day
- Hong Kong
- GMT+8
- Tokyo
- GMT+9
- Difference
- +1h
- Business overlap
- 7h
Hour-by-hour conversion
Each row shows the matching local time in Tokyo for an hour in Hong Kong.
| Hong Kong | Tokyo | Day | Window |
|---|---|---|---|
| 12:00 AM | 1:00 AM | same day | — |
| 1:00 AM | 2:00 AM | same day | — |
| 2:00 AM | 3:00 AM | same day | — |
| 3:00 AM | 4:00 AM | same day | — |
| 4:00 AM | 5:00 AM | same day | — |
| 5:00 AM | 6:00 AM | same day | — |
| 6:00 AM | 7:00 AM | same day | — |
| 7:00 AM | 8:00 AM | same day | — |
| 8:00 AM | 9:00 AM | same day | — |
| 9:00 AM | 10:00 AM | same day | Both 9-5 |
| 10:00 AM | 11:00 AM | same day | Both 9-5 |
| 11:00 AM | 12:00 PM | same day | Both 9-5 |
| 12:00 PM | 1:00 PM | same day | Both 9-5 |
| 1:00 PM | 2:00 PM | same day | Both 9-5 |
| 2:00 PM | 3:00 PM | same day | Both 9-5 |
| 3:00 PM | 4:00 PM | same day | Both 9-5 |
| 4:00 PM | 5:00 PM | same day | — |
| 5:00 PM | 6:00 PM | same day | — |
| 6:00 PM | 7:00 PM | same day | — |
| 7:00 PM | 8:00 PM | same day | — |
| 8:00 PM | 9:00 PM | same day | — |
| 9:00 PM | 10:00 PM | same day | — |
| 10:00 PM | 11:00 PM | same day | — |
| 11:00 PM | 12:00 AM | next day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 9:00 AM – 4:00 PM in Hong Kong time. That gives you 7 hours per workday for live meetings.
Tighter overlap is achievable by having the side with later working hours start earlier, or by treating the first and last hours of each side as flexible. The bar above marks every hour where both cities sit inside a 9 AM – 5 PM window.
About converting Hong Kong time to Tokyo time
Hong Kong follows the Asia/Hong_Kong time zone (currently GMT+8, GMT+8), while Tokyo follows Asia/Tokyo (currently GMT+9, GMT+9). Tokyo is 1 hour ahead of Hong Kong right now.
Neither city observes daylight saving time, so the offset between them is the same all year.
Reverse this conversion
Tokyo to Hong Kong
Open the converter
Plan a meeting between Hong Kong and Tokyo
More conversions from Hong Kong
Frequently asked questions
- How many hours is Hong Kong from Tokyo?
- Tokyo is 1 hour ahead of Hong Kong right now.
- What time is 9:00 AM Hong Kong in Tokyo?
- 9:00 AM in Hong Kong is 10:00 AM in Tokyo.
- What time is 5:00 PM Hong Kong in Tokyo?
- 5:00 PM in Hong Kong is 6:00 PM in Tokyo.
- When do Hong Kong and Tokyo business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 7 hours, roughly from 9:00 AM to 4:00 PM in Hong Kong time.
- Does daylight saving time change the difference between Hong Kong and Tokyo?
- Neither Hong Kong nor Tokyo observes daylight saving time, so the offset between them is constant year-round.
Local time page
Time in Hong Kong
Local time page
Time in Tokyo