Tokyo
UTC
Convert JST to UTC
Japan Standard Time to Coordinated Universal Time — UTC is 9 hours behind Tokyo
Quick Facts
Time Difference
-9 hours
JST Full Name
Japan Standard Time
UTC Full Name
Coordinated Universal Time
JST to UTC Conversion Table
Related Conversions
About JST and UTC Time Zones
JST (Japan Standard Time) is UTC+9 and covers cities like Tokyo, Osaka, Kyoto. UTC (Coordinated Universal Time) is UTC+0 and covers cities like Universal reference time.
When it's 12:00 PM (noon) in Tokyo (JST), it's 3:00 AM in UTC (UTC). The time difference between JST and UTC is 9 hours — UTC is behind Tokyo.
The 9-hour difference makes real-time overlap challenging — early morning calls (7–9 AM JST) work best.
Use our world clock tool to compare Tokyo and UTC with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between JST and UTC?
UTC (UTC) is 9 hours behind Tokyo (JST). The offset is -9 hours.
Is UTC ahead or behind JST?
UTC is 9 hours behind JST. JST is UTC+9 and UTC is UTC+0.
When it's 12:00 PM in Tokyo, what time is it in UTC?
When it's 12:00 PM (noon) in Tokyo (JST), it's 3:00 AM in UTC (UTC).
When it's 5:00 PM in Tokyo, what time is it in UTC?
When it's 5:00 PM in Tokyo (JST), it's 8:00 AM in UTC (UTC).