Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between jst and hkt?
Japan Standard Time (jst) is UTC+9 and Hong Kong Time (hkt) is UTC+8. The difference between them is 1 hours.
Where is jst used?
Japan Standard Time (jst) is used in Japan and surrounding regions. The IANA timezone identifier is Asia/Tokyo.
Where is hkt used?
Hong Kong Time (hkt) is used in Hong Kong and surrounding regions. The IANA timezone identifier is Asia/Hong_Kong.
How do I convert jst to hkt?
Use the interactive converter above. Drag the time slider to any jst time and the hkt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
JST (Tokyo) to HKT (Hong Kong) — exact time difference
JST (Tokyo) is 1 hour ahead of HKT (Hong Kong). When JST (Tokyo) clocks hit noon, HKT (Hong Kong) reads 11:00.
JST (Tokyo) is in the Asia/Tokyo timezone. HKT (Hong Kong) is in Asia/Hong_Kong. The difference is 1 hour.
Working hours overlap
Every working day, JST (Tokyo) and HKT (Hong Kong) are both in business hours for 7 hours simultaneously.
00:0006:0012:0018:0024:00
JST (Tokyo)
HKT (Hong Kong)
Overlap (7h)
When to schedule across time zones
Both JST (Tokyo) and HKT (Hong Kong) are in standard hours simultaneously for 7h per day. 3 recommended slots shown below.
10:00 Tokyo / 09:00 Hong Kong✓ Both working
11:00 Tokyo / 10:00 Hong Kong✓ Both working
12:00 Tokyo / 11:00 Hong Kong✓ Both working
Based on standard 09:00–17:00 working hours in each location's local time.
Holiday calendar for both locations
⚡ Both locations have upcoming holidays, check availability before scheduling.
JST (Tokyo)7 holidays
Jul 20Marine Day
Aug 11Mountain Day
Sep 21Respect for the Aged Day
Sep 23Autumnal Equinox Day
Oct 12Sports Day
HKT (Hong Kong)7 holidays
Jun 19Dragon Boat FestivalSOON
Jul 1Hong Kong Special Administrative Region Establishment DaySOON
Sep 26Day following the Mid-Autumn Festival
Oct 1National Day
Oct 19Chung Yeung Festival
Working across JST (Tokyo) and HKT (Hong Kong)
Working across JST (Tokyo) (Japan) and HKT (Hong Kong) (Hong Kong) involves a 1-hour gap. The good news: there is a 7-hour mutual window in standard business hours that lets both sides collaborate without anyone joining at an unreasonable hour.
💡 Best practice for cross-timezone meetings
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10:00–11:00 in JST (Tokyo) = 09:00–10:00 in HKT (Hong Kong). Both sides are in standard business hours during this window.
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11:00–12:00 in JST (Tokyo) = 10:00–11:00 in HKT (Hong Kong). Both sides are in standard business hours during this window.
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12:00–13:00 in JST (Tokyo) = 11:00–12:00 in HKT (Hong Kong). Both sides are in standard business hours during this window.
DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.
Use the time slider above to find the exact equivalent time for any moment in JST (Tokyo). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.
