JST to AEST Converter – Convert Japan Time to Australian Eastern Time

AEST is 1 hour ahead of JST, so to convert mentally, add 1 hour to your JST time. For example: 9:00 AM JST = 10:00 AM AEST. Our converter automatically adjusts for Daylight Saving Time so you always get the right result.

AEST (Australian Eastern Standard Time, UTC+10) is 1 hour ahead of JST (Japan Standard Time, UTC+9) during standard time. For example, 9:00 AM JST = 10:00 AM AEST. During DST periods, this difference changes by 1 hour when one or both zones observe Daylight Saving Time — our converter automatically applies the correct offset for any date you select.

The best overlap for standard business hours (9 AM–5 PM) in both zones is 09:00–16:00 JST = 10:00–17:00 AEST. Schedule recurring calls in this window to keep both sides within normal working hours. Remember to re-check the window in March and November (or March/October for European zones) when DST transitions can shift the overlap by 1 hour.

Japan does not observe Daylight Saving Time. JST remains constant year-round, which simplifies conversions.

Major cities in the JST (Japan Standard Time, UTC+9) timezone include: Tokyo, Osaka, Yokohama, Nagoya, Sapporo, Kyoto, Fukuoka. JST is a fixed-offset zone — these cities do not observe Daylight Saving Time.

Major cities in the AEST (Australian Eastern Standard Time, UTC+10) timezone include: Sydney, Melbourne, Canberra, Hobart (Brisbane uses AEST year-round without DST). These cities switch to AEDT (UTC+11) from the first Sunday in October to the first Sunday in April.

AEST is 1 hour ahead of JST. The best overlap for business hours is 09:00–16:00 JST = 10:00–17:00 AEST. Always include both local times in calendar invites (for example, "2:00 PM JST / 3:00 PM AEST AEST"). Double-check around March and November (or March/October for European zones) when DST transitions can shift the offset by 1 hour. For full scheduling guidance, see our international meeting times guide.