JST to AEST Converter & Meeting Planner
Quick answer: 9:00 AM JST = 10:00 AM AEST (fixed +09:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Japan Standard Time (JST) and Australian Eastern Standard Time (AEST)? You need to account for the standard time difference. Australian Eastern Standard Time is normally 1 hours ahead of Japan Standard Time. Whether you are coordinating between teams in Tokyo and Osaka and Sydney and Melbourne, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM JST = 1:00 AM AEST. The full 24-hour JST to AEST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM JST = 4:00 PM AEST.
| JST Time | AEST Time |
|---|---|
| 12:00 AM (00:00) | 1:00 AM (01:00) |
| 1:00 AM (01:00) | 2:00 AM (02:00) |
| 2:00 AM (02:00) | 3:00 AM (03:00) |
| 3:00 AM (03:00) | 4:00 AM (04:00) |
| 4:00 AM (04:00) | 5:00 AM (05:00) |
| 5:00 AM (05:00) | 6:00 AM (06:00) |
| 6:00 AM (06:00) | 7:00 AM (07:00) |
| 7:00 AM (07:00) | 8:00 AM (08:00) |
| 8:00 AM (08:00) | 9:00 AM (09:00) |
| 9:00 AM (09:00) | 10:00 AM (10:00) |
| 10:00 AM (10:00) | 11:00 AM (11:00) |
| 11:00 AM (11:00) | 12:00 PM (12:00) |
| 12:00 PM (12:00) | 1:00 PM (13:00) |
| 1:00 PM (13:00) | 2:00 PM (14:00) |
| 2:00 PM (14:00) | 3:00 PM (15:00) |
| 3:00 PM (15:00) | 4:00 PM (16:00) |
| 4:00 PM (16:00) | 5:00 PM (17:00) |
| 5:00 PM (17:00) | 6:00 PM (18:00) |
| 6:00 PM (18:00) | 7:00 PM (19:00) |
| 7:00 PM (19:00) | 8:00 PM (20:00) |
| 8:00 PM (20:00) | 9:00 PM (21:00) |
| 9:00 PM (21:00) | 10:00 PM (22:00) |
| 10:00 PM (22:00) | 11:00 PM (23:00) |
| 11:00 PM (23:00) | 12:00 AM (00:00)+1 day |
Best time to call Sydney from Tokyo
For most work calls, compare the normal business day in Tokyo (JST) with the business day in Sydney (AEST). JST commonly covers East Asia, while AEST is mainly associated with Oceania, Australia.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 9:00 AM - 4:00 PM JST, which corresponds to 10:00 AM - 5:00 PM AEST. This window sits inside the typical JST workday (9:00 AM - 6:00 PM) and the AEST workday (9:00 AM - 5:00 PM).
- DST Safety: JST or AEST may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Tokyo Stock Exchange (TSE): 09:00-15:00 local time in Tokyo.
- Australian Securities Exchange (ASX): 10:00-16:00 local time in Sydney.
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Frequently Asked Questions
What is the time difference between JST and AEST?
During standard time, Australian Eastern Standard Time is 1 hours ahead of Japan Standard Time.
Does Japan observe Daylight Saving Time?
Japan has not observed Daylight Saving Time since 1951, when the practice introduced during the Allied occupation was abolished by the Japanese government. JST has remained fixed at UTC+9:00 ever since, and there is no current legislation to reintroduce DST in Japan.
Is JST the same as Korean Standard Time (KST)?
Yes, South Korea's Korean Standard Time (KST) operates at the same UTC+9:00 offset as JST, and South Korea also does not observe Daylight Saving Time. The two countries share an identical clock year-round, which simplifies scheduling for the significant trade, technology, and cultural exchange between Tokyo and Seoul.
Does all of eastern Australia observe Daylight Saving Time?
No — eastern Australia is split on DST. New South Wales (Sydney), Victoria (Melbourne), Tasmania (Hobart), and the ACT (Canberra) advance their clocks to AEDT (UTC+11) each October, while Queensland (Brisbane) opts out entirely and remains on AEST (UTC+10) year-round. This means Sydney and Brisbane run on the same clock for only part of the year.
What is the difference between AEST and AEDT?
AEST (Australian Eastern Standard Time) is the UTC+10:00 offset observed during the Southern Hemisphere winter months, roughly April through October. AEDT (Australian Eastern Daylight Time) is the UTC+11:00 offset applied during the Southern Hemisphere summer when clocks spring forward in October, observed by New South Wales, Victoria, Tasmania, and the ACT.