Riyadh
Tokyo
Convert AST to JST
Arabia Standard Time to Japan Standard Time — Tokyo is 6 hours ahead of Riyadh
Quick Facts
Time Difference
+6 hours
AST Full Name
Arabia Standard Time
JST Full Name
Japan Standard Time
AST to JST Conversion Table
Related Conversions
About AST and JST Time Zones
AST (Arabia Standard Time) is UTC+3 and covers cities like Riyadh, Jeddah, Baghdad. JST (Japan Standard Time) is UTC+9 and covers cities like Tokyo, Osaka, Kyoto.
When it's 12:00 PM (noon) in Riyadh (AST), it's 6:00 PM in Tokyo (JST). The time difference between AST and JST is 6 hours — Tokyo is ahead of Riyadh.
The best meeting window is 3:00 PM–5:00 PM AST (9:00 AM–11:00 AM JST).
Use our world clock tool to compare Riyadh and Tokyo with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between AST and JST?
Tokyo (JST) is 6 hours ahead of Riyadh (AST). The offset is +6 hours.
Is JST ahead or behind AST?
JST is 6 hours ahead of AST. AST is UTC+3 and JST is UTC+9.
When it's 12:00 PM in Riyadh, what time is it in Tokyo?
When it's 12:00 PM (noon) in Riyadh (AST), it's 6:00 PM in Tokyo (JST).
When it's 5:00 PM in Riyadh, what time is it in Tokyo?
When it's 5:00 PM in Riyadh (AST), it's 11:00 PM in Tokyo (JST).