What is the time difference between JST and AEST?

Australian Eastern Standard Time (AEST) is 2 hours ahead of Japan Standard Time (JST). JST uses a UTC offset of UTC+9, while AEST uses UTC+11. For example, when it's 9:00 AM in JST, it's 11:00 AM in AEST. Note that this difference may shift by one hour during daylight saving time transitions if AEST observes DST. Use the conversion table above to see the exact time for each hour of the day.

How do I convert JST to AEST?

To convert JST to AEST, add 2 hours to the JST time. For example, 9:00 AM JST is 11:00 AM AEST, and 5:00 PM JST is 7:00 PM AEST. Keep in mind that during daylight saving time transitions, the offset between these timezones may temporarily change by one hour. You can also use the interactive converter above for quick, accurate results.

What time is it in AEST when it's noon in JST?

When it's 12:00 PM (noon) in JST, it's 2:00 PM in AEST. This is because AEST is 2 hours ahead of JST. Similarly, when it's 6:00 PM in JST, it's 8:00 PM in AEST. During daylight saving time transitions, these times may shift by one hour, so always verify the current offset. The color-coded conversion table above shows every hour mapped between both timezones.

How many hours ahead is AEST from JST?

AEST is 2 hours ahead of JST. This means when it's 9:00 AM in JST, it's 11:00 AM in AEST, and when it's midnight in JST, it's 2:00 AM in AEST. The exact difference can vary by one hour during daylight saving time transitions. The conversion table above provides a complete hour-by-hour mapping.

Is AEST ahead or behind JST?

AEST is ahead of JST by 2 hours. Clocks in AEST show a later time than JST, meaning the day starts earlier in AEST relative to JST. For example, when it's morning in JST, it's later in the morning in AEST. This gap may change by one hour during DST transitions.

Does JST observe daylight saving time?

No, Japan Standard Time does not observe daylight saving time. The UTC offset of UTC+9 remains the same year-round, making time conversions from JST more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

Does AEST observe daylight saving time?

Yes, Australian Eastern Standard Time observes daylight saving time. During DST, the abbreviation changes to AEDT and clocks move forward by one hour, typically in spring. Clocks then fall back in autumn, returning to standard AEST time. This means the UTC offset for AEST shifts between two values depending on the season. Check our DST change calendar for exact transition dates that may affect your JST to AEST conversions.

What is the best time to call from JST to AEST?

The best time for a call between JST and AEST is during overlapping business hours (9 AM – 5 PM) in both timezones. To reach someone in AEST during their work day, call between 7:00 AM and 3:00 PM your JST time. Avoid calling too early or late, as the 2 hours difference means your evening could be their late night. Check the color-coded conversion table above — green hours indicate business hours in both zones, making it easy to find the ideal time.

When does daylight saving time change in AEST?

Daylight saving time transitions vary by year and region. Australian Eastern Standard Time observes DST, which typically shifts clocks forward by one hour in spring ("spring forward") and back in fall ("fall back"). During these transition periods, the time difference between JST and AEST may temporarily change by one hour, which can cause confusion for scheduled meetings or calls. It's important to double-check your conversions around transition dates, especially if the two timezones switch on different dates. Check our DST change calendar for exact transition dates in the current year.

Do JST and AEST ever have the same time?

No, JST and AEST never show the same time because their base UTC offsets are different. However, because AEST observes daylight saving time and JST does not, the time difference between them changes by one hour during DST transitions. This means the gap narrows or widens depending on the season, but the two clocks never align. Always verify the current offset around DST transition dates to avoid scheduling errors.

JST to AEST Converter

Convert Japan Standard Time to Australian Eastern Standard Time. See the hour-by-hour conversion table below.

Upcoming DST Change

Australian Eastern Time (AEDT) will fall back on April 5. Clocks will shift by 1 hour (AEDT → AEST).

View all DST changes

Timezone Details

Japan Standard Time

10:38 PM

Friday, April 3, 2026

JST (UTC+09:00)

Australian Eastern Standard Time

12:38 AM

Saturday, April 4, 2026

AEDT (UTC+11:00)

Difference: +2 hours

JST DST: No

AEDT DST: Yes (AEDT)

24-Hour Overview

JST — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

AEDT — 24-hour overview

2a2a

5a5a

8a8a

10a

11a11a

12p

2p2p

5p5p

8p8p

10p

11p11p

12a

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

AEST to JST EST to JST JST to EST PST to JST JST to PST GMT to JST JST to GMT GMT to AEST AEST to GMT

Cities in These Timezones

JST Cities

Tokyo Osaka Fukuoka

AEST Cities

Sydney Canberra

More Tools

Compare JST & AEST Plan a Meeting (JST & AEST)See on Map

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

Japan Standard Time on Wikipedia Australian Eastern Standard Time on Wikipedia IANA Time Zone Database