Osaka to HKT
-1hOsaka
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.
About Osaka
WikipediaOsaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.
Osaka Castle was originally built in 1583 and has been rebuilt several times.
Osaka vs HKT: Offsets, DST and Best Call Times
Osaka runs on Japan Standard Time (JST) at UTC+09:00. HKT runs on Hong Kong Time (HKT) at UTC+08:00. That puts Osaka 1 hour behind HKT — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in Osaka it is 8:00 AM in HKT. Midnight in Osaka is 11:00 PM in HKT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Osaka to HKT time conversion table
| Osaka (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 Osaka to HKT time
- Scheduling a call from Osaka to HKT: a 10:00 AM start in Osaka lands at 9:00 AM in HKT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Osaka 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.
- Watching a live event or market open: Osaka viewers need 8:00 AM in HKT to catch a 9:00 AM start there, and 1:00 AM if the event is anchored to Osaka.
- 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 Osaka 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 Osaka and HKT
Both Osaka 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
Osaka and HKT share 7 hours of working-hours overlap (10:00 AM–5:00 PM JST), so scheduling a live meeting is straightforward.
Osaka 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 Osaka and HKT?
Osaka (JST, UTC+09:00) is 1 hour behind HKT (HKT, UTC+08:00). The gap is currently -1h.
How do I convert Osaka time to HKT time?
Add -1h to Osaka local time. For example, 9:00 AM in Osaka 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 Osaka.
What is the best time to call HKT from Osaka?
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, Osaka or HKT?
Osaka is 1 hour behind HKT. When it is 12:00 PM in Osaka it is 11:00 AM in HKT.
Do Osaka and HKT use different time zones?
Osaka (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 Osaka–HKT difference?
Neither zone observes daylight saving time, so the -1h offset between Osaka and HKT is fixed all year.
Which other cities share Osaka's time zone?
JST also covers Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka and 1 more.
Which countries use JST, Osaka's zone?
JST is used in Japan.
Is there a day difference between Osaka and HKT?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between Osaka and HKT?
HKT is -1h from Osaka.
What timezone is Osaka in?
Osaka operates on Japan Standard Time (JST), UTC+9. As Japan's second economic center and a manufacturing hub, Osaka shares business hours with Tokyo.
What timezone is HKT in?
HKT operates on its local timezone.
What are the business hours in Osaka?
Standard business hours in Osaka are 9:00 AM - 6:00 PM JST.
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 Osaka, what time is it in HKT?
When it is 12:00 AM (midnight) in Osaka (JST), it is -1h later in HKT (HKT).
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