JST to AEST Time Converter
Australian Eastern Standard Time (AEST) is currently 1 hour ahead of Japan Standard Time (JST). JST is UTC+9 and AEST is UTC+10. The table below converts every hour of the day between the two, and the call planner shows where working hours line up.
Best Time for a Call
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 4:00 PM in JST, which is 10:00 AM to 5:00 PM in AEST.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: JST to AEST
Rows marked office hours fall between 9:00 AM and 5:00 PM in both places. For a specific date, use the interactive converter.
Does the Difference Change During the Year?
JST and AEST are fixed offsets, so the difference between them never changes.
JST is UTC+9. Japan has no daylight saving, so this offset never changes.
AEST is UTC+10. Sydney and Melbourne switch to AEDT (UTC+11) from October to April, while Brisbane stays on AEST year round.
Frequently Asked Questions
How many hours ahead is AEST compared to JST?
AEST is currently 1 hour ahead of JST. JST and AEST are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in JST in AEST?
9:00 AM in JST is 10:00 AM in AEST.
What is the best time for a call between JST and AEST?
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 4:00 PM in JST, which is 10:00 AM to 5:00 PM in AEST.