Sydney to Osaka
-1hSydney
AESTSOURCEOsaka
JSTGreen rows indicate typical business hours (9 AM - 5 PM)
AEST and JST on the World Map
The map below highlights the AEST (Australian Eastern Standard Time) and JST (Japan Standard Time) timezone regions across the globe.
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.
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.
About Sydney
WikipediaSydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.
Sydney is one of the first major cities to welcome the New Year.
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.
Everything You Need to Know About Sydney and Osaka Time
Sydney runs on Australian Eastern Standard Time (AEST) at UTC+10:00. Osaka runs on Japan Standard Time (JST) at UTC+09:00. That puts Sydney 1 hour behind Osaka — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in Sydney it is 8:00 AM in Osaka. Midnight in Sydney is 11:00 PM in Osaka. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Sydney to Osaka time conversion table
| Sydney (AEST) | Osaka (JST) | 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 Sydney to Osaka time
- Scheduling a call from Sydney to Osaka: a 10:00 AM start in Sydney lands at 9:00 AM in Osaka, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Sydney and Osaka are inside the 9-to-5 working day between 10:00 AM and 5:00 PM AEST time (9:00 AM–4:00 PM JST). That is roughly 7 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Sydney is 7:00 PM in Osaka makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM AEST" is unambiguous; "3 PM" across a -1h gap is not.
- Block 10:00 AM–5:00 PM AEST as the recurring meeting window if you work primarily from Sydney and need Osaka colleagues present.
- Sydney: Clocks spring forward on Sat, Oct 3, 2026. Re-check this page after that date because the offset changes and so does the -1h gap.
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.
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.
Best time to call between Sydney and Osaka
Both Sydney and Osaka sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM AEST, which is 9:00 AM–4:00 PM JST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Sydney and Osaka share 7 hours of working-hours overlap (10:00 AM–5:00 PM AEST), so scheduling a live meeting is straightforward.
Sydney is 1 hour behind Osaka (AEST UTC+10:00 → JST UTC+09:00). The shared working window is 10:00 AM–5:00 PM AEST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Sydney
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
Osaka
Does not observe DST
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 Sydney and Osaka?
Sydney (AEST, UTC+10:00) is 1 hour behind Osaka (JST, UTC+09:00). The gap is currently -1h.
How do I convert Sydney time to Osaka time?
Add -1h to Sydney local time. For example, 9:00 AM in Sydney is 8:00 AM in Osaka.
What time is it in Osaka right now?
Osaka uses JST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from Sydney.
What is the best time to call Osaka from Sydney?
Call between 10:00 AM and 5:00 PM AEST — that maps to 9:00 AM–4:00 PM JST and keeps both parties inside the working day.
Which is behind, Sydney or Osaka?
Sydney is 1 hour behind Osaka. When it is 12:00 PM in Sydney it is 11:00 AM in Osaka.
Do Sydney and Osaka use different time zones?
Sydney (Australia) uses AEST at UTC+10:00, while Osaka (Japan) uses JST at UTC+09:00. The IANA identifiers are Australia/Sydney and Asia/Tokyo.
Does daylight saving time affect the Sydney–Osaka difference?
Neither zone observes daylight saving time, so the -1h offset between Sydney and Osaka is fixed all year.
Which other cities share Sydney's time zone?
AEST also covers Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.
Which countries use AEST, Sydney's zone?
AEST is used in Australia (NSW, VIC, QLD, TAS, ACT), Papua New Guinea.
Is there a day difference between Sydney and Osaka?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between Sydney and Osaka?
Osaka is -1h from Sydney.
What timezone is Sydney in?
Sydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.
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 are the business hours in Sydney?
Standard business hours in Sydney are 9:00 AM - 5:00 PM AEST.
What are the business hours in Osaka?
Standard business hours in Osaka are 9:00 AM - 6:00 PM JST.
What is the best time to schedule a call between Sydney and Osaka?
The best overlap for a call is when both cities are in business hours. Sydney works 9:00 AM - 5:00 PM AEST and Osaka works 9:00 AM - 6:00 PM JST (-1h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Sydney and Osaka?
Sydney uses AUD (A$) while Osaka uses JPY (¥). Check current exchange rates when planning travel or business between these cities.
How do Sydney and Osaka compare in size?
Sydney has a population of approximately 5.4 million (metro: 5.4 million), while Osaka has approximately 2.8 million (metro: 19 million).
What are the major landmarks in Sydney and Osaka?
Sydney is known for Sydney Opera House, Sydney Harbour Bridge, Bondi Beach. Osaka is famous for Osaka Castle, Dotonbori, Universal Studios Japan.
Do Sydney and Osaka have stock exchanges?
Yes. Sydney has the ASX (Australian Securities Exchange) and Osaka has the OSE (Osaka Exchange - derivatives). The -1h time difference affects trading hour overlaps between these exchanges.
Which countries use AEST (Australian Eastern Standard Time)?
AEST is used in Australia (NSW, VIC, QLD, TAS, ACT), Papua New Guinea.
Does AEST observe daylight saving time?
Yes, AEST switches to AEDT during summer months.
What are some interesting facts about AEST?
Queensland does not observe daylight saving time, staying on AEST year-round. Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
Which cities are in the JST timezone?
Major cities in the JST timezone include Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Kobe, Fukuoka.
What is the UTC offset for JST?
Japan Standard Time (JST) is at UTC+09:00.
What should I know about the JST timezone?
Japan does not observe daylight saving time. Tokyo is the most populous metropolitan area in the world.
When is it midnight in Sydney, what time is it in Osaka?
When it is 12:00 AM (midnight) in Sydney (AEST), it is -1h later in Osaka (JST).
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