Osaka to AEST
+1hOsaka
JSTSOURCEAEST
AESTGreen rows indicate typical business hours (9 AM - 5 PM)
JST and AEST on the World Map
The map below highlights the JST (Japan Standard Time) and AEST (Australian Eastern Standard 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.
AEST – Australian Eastern Standard Time
UTC+10:00Australian Eastern Standard Time (AEST) covers eastern Australia, 10 hours ahead of UTC.
- •Queensland does not observe daylight saving time, staying on AEST year-round.
- •Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
- •The Australian Securities Exchange (ASX) operates on AEST/AEDT.
- •AEST is 15 hours ahead of EST during winter.
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.
Understanding the +1h Gap: Osaka vs AEST
Osaka runs on Japan Standard Time (JST) at UTC+09:00. AEST runs on Australian Eastern Standard Time (AEST) at UTC+10:00. That puts Osaka 1 hour ahead of AEST — a difference of +1h at the current offsets.
In practice, when it is 9:00 AM in Osaka it is 10:00 AM in AEST. Midnight in Osaka is 1:00 AM in AEST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Osaka to AEST time conversion table
| Osaka (JST) | AEST (AEST) | Day |
|---|---|---|
| 12:00 AM | 1:00 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 |
| 12:00 PM | 1:00 PM | same day |
| 3:00 PM | 4:00 PM | same day |
| 5:00 PM | 6:00 PM | same day |
| 6:00 PM | 7:00 PM | same day |
| 9:00 PM | 10:00 PM | same day |
Why people convert Osaka to AEST time
- Scheduling a call from Osaka to AEST: a 10:00 AM start in Osaka lands at 11:00 AM in AEST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Osaka and AEST are inside the 9-to-5 working day between 9:00 AM and 4:00 PM JST time (10:00 AM–5:00 PM AEST). That is roughly 7 hours of usable overlap.
- Booking travel or deliveries: tracking AEST local time against Osaka keeps pickup windows and arrival estimates honest across the +1h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM JST" is unambiguous; "3 PM" across a +1h gap is not.
- Block 9:00 AM–4:00 PM JST as the recurring meeting window if you work primarily from Osaka and need AEST 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 AEST (Australian Eastern Standard Time)
Australian Eastern Standard Time (AEST) is used in the eastern states of Australia including New South Wales, Victoria, Queensland, Tasmania, and the ACT. During summer (October to April), NSW, VIC, TAS, and ACT switch to Australian Eastern Daylight Time (AEDT, UTC+11:00), while Queensland remains on AEST year-round.
Best time to call between Osaka and AEST
Both Osaka and AEST sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM JST, which is 10:00 AM–5:00 PM AEST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Osaka and AEST share 7 hours of working-hours overlap (9:00 AM–4:00 PM JST), so scheduling a live meeting is straightforward.
Osaka is 1 hour ahead of AEST (JST UTC+09:00 → AEST UTC+10:00). The shared working window is 9:00 AM–4:00 PM JST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Osaka
Does not observe DST
AEST
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
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 AEST?
Osaka (JST, UTC+09:00) is 1 hour ahead of AEST (AEST, UTC+10:00). The gap is currently +1h.
How do I convert Osaka time to AEST time?
Add +1h to Osaka local time. For example, 9:00 AM in Osaka is 10:00 AM in AEST.
What time is it in AEST right now?
AEST uses AEST at UTC+10:00. 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 AEST from Osaka?
Call between 9:00 AM and 4:00 PM JST — that maps to 10:00 AM–5:00 PM AEST and keeps both parties inside the working day.
Which is ahead, Osaka or AEST?
Osaka is 1 hour ahead of AEST. When it is 12:00 PM in Osaka it is 1:00 PM in AEST.
Do Osaka and AEST use different time zones?
Osaka (Japan) uses JST at UTC+09:00, while AEST uses AEST at UTC+10:00. The IANA identifiers are Asia/Tokyo and Australia/Sydney.
Does daylight saving time affect the Osaka–AEST difference?
Neither zone observes daylight saving time, so the +1h offset between Osaka and AEST 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 AEST?
Not normally. The +1h gap only pushes the date over for late-evening times.
What is the time difference between Osaka and AEST?
AEST 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 AEST in?
AEST 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 AEST timezone?
Major cities in the AEST timezone include Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.
What is the UTC offset for AEST?
Australian Eastern Standard Time (AEST) is at UTC+10:00. During daylight saving time, it shifts to AEDT.
What should I know about the AEST timezone?
Queensland does not observe daylight saving time, staying on AEST year-round. Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
When is it midnight in Osaka, what time is it in AEST?
When it is 12:00 AM (midnight) in Osaka (JST), it is +1h later in AEST (AEST).
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