Japan to HKT
-1hJapan
JSTSOURCEHKT
HKTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and HKT on the World Map
The map below highlights the JST (Japan Standard Time) and HKT (Hong Kong Time) timezone regions across the globe.
JST – Japan Standard Time
UTC+09:00Japan Standard Time (JST) is the time zone for Japan, 9 hours ahead of UTC.
- •Japan does not observe daylight saving time.
- •Tokyo is the most populous metropolitan area in the world.
- •The Tokyo Stock Exchange operates from 9:00 AM to 3:00 PM JST.
- •JST is 14 hours ahead of EST and 9 hours ahead of GMT.
HKT – Hong Kong Time
UTC+08:00Hong Kong Time (HKT, UTC+08:00) is the time zone for Hong Kong, 8 hours ahead of UTC.
- •Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979.
- •HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.
- •The Hong Kong Stock Exchange opens at 09:30 HKT.
- •Hong Kong Time does not change with the seasons, so its gap to other zones is fixed.
Everything You Need to Know About Japan and HKT Time
Japan runs on Japan Standard Time (JST) at UTC+09:00. HKT runs on Hong Kong Time (HKT) at UTC+08:00. That puts Japan 1 hour behind HKT — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in Japan it is 8:00 AM in HKT. Midnight in Japan is 11:00 PM in HKT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Japan to HKT time conversion table
| Japan (JST) | HKT (HKT) | Day |
|---|---|---|
| 12:00 AM | 11:00 PM | previous day |
| 6:00 AM | 5:00 AM | same day |
| 7:00 AM | 6:00 AM | same day |
| 8:00 AM | 7:00 AM | same day |
| 9:00 AM | 8:00 AM | same day |
| 12:00 PM | 11:00 AM | same day |
| 3:00 PM | 2:00 PM | same day |
| 5:00 PM | 4:00 PM | same day |
| 6:00 PM | 5:00 PM | same day |
| 9:00 PM | 8:00 PM | same day |
Why people convert Japan to HKT time
- Scheduling a call from Japan to HKT: a 10:00 AM start in Japan lands at 9:00 AM in HKT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Japan and HKT are inside the 9-to-5 working day between 10:00 AM and 5:00 PM JST time (9:00 AM–4:00 PM HKT). That is roughly 7 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Japan is 7:00 PM in HKT makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a -1h gap is not.
- Block 10:00 AM–5:00 PM JST as the recurring meeting window if you work primarily from Japan and need HKT colleagues present.
About JST (Japan Standard Time)
Japan Standard Time (JST) is the standard time zone for all of Japan. Japan does not observe daylight saving time. JST is 9 hours ahead of UTC and 14 hours ahead of EST. The Tokyo Stock Exchange, the world's third largest by market capitalization, operates on JST. South Korea uses the same offset (KST) but it is a distinct time zone.
About HKT (Hong Kong Time)
Hong Kong Time (HKT) is fixed at UTC+08:00 all year and does not observe daylight saving time. Hong Kong last used summer time in 1979 and has kept a single offset since. HKT shares the UTC+08:00 offset with China Standard Time, Singapore Time, Malaysian Time, Philippine Time and Australian Western Standard Time, but is listed separately because Hong Kong maintains its own timekeeping authority. As a major financial centre, Hong Kong's trading hours set the rhythm for markets across Asia, opening at 09:30 HKT which is 01:30 in London and 20:30 the previous evening in New York.
Best time to call between Japan and HKT
Both Japan and HKT sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM JST, which is 9:00 AM–4:00 PM HKT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Japan and HKT share 7 hours of working-hours overlap (10:00 AM–5:00 PM JST), so scheduling a live meeting is straightforward.
Japan is 1 hour behind HKT (JST UTC+09:00 → HKT UTC+08:00). The shared working window is 10:00 AM–5:00 PM JST. Remember to re-check around daylight-saving transitions.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Japan and HKT?
Japan (JST, UTC+09:00) is 1 hour behind HKT (HKT, UTC+08:00). The gap is currently -1h.
How do I convert Japan time to HKT time?
Add -1h to Japan local time. For example, 9:00 AM in Japan is 8:00 AM in HKT.
What time is it in HKT right now?
HKT uses HKT at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from Japan.
What is the best time to call HKT from Japan?
Call between 10:00 AM and 5:00 PM JST — that maps to 9:00 AM–4:00 PM HKT and keeps both parties inside the working day.
Which is behind, Japan or HKT?
Japan is 1 hour behind HKT. When it is 12:00 PM in Japan it is 11:00 AM in HKT.
Do Japan and HKT use different time zones?
Japan (Japan) uses JST at UTC+09:00, while HKT uses HKT at UTC+08:00. The IANA identifiers are Asia/Tokyo and Asia/Hong_Kong.
Does daylight saving time affect the Japan–HKT difference?
Neither zone observes daylight saving time, so the -1h offset between Japan and HKT is fixed all year.
Which other cities share Japan's time zone?
JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.
Which countries use JST, Japan's zone?
JST is used in Japan.
Is there a day difference between Japan and HKT?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between Japan and HKT?
HKT is -1h from Japan.
What timezone is Japan in?
Japan operates on its local timezone.
What timezone is HKT in?
HKT operates on its local timezone.
Which countries use JST (Japan Standard Time)?
JST is used in Japan.
Does JST observe daylight saving time?
No, JST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about JST?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
Which cities are in the HKT timezone?
Major cities in the HKT timezone include Hong Kong, Kowloon, Tsuen Wan, Sha Tin.
What is the UTC offset for HKT?
Hong Kong Time (HKT) is at UTC+08:00.
What should I know about the HKT timezone?
Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979. HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.
When is it midnight in Japan, what time is it in HKT?
When it is 12:00 AM (midnight) in Japan (JST), it is -1h later in HKT (HKT).
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