Time Difference: Tehran vs Tokyo
Tehran
6:32:13 AM IRST
Thursday, May 14, 2026
5h 30m
5h 30m
Tokyo
12:02:13 PM JST
Thursday, May 14, 2026
Tokyo is 5.5 hours ahead of Tehran.
Quick Reference
- Tehran
- IRST (GMT+3:30)
No Daylight Saving Time
- Tokyo
- JST (GMT+9)
No Daylight Saving Time
Frequently Asked Questions
- What is the time difference between Tehran and Tokyo?
- Tokyo is 5.5 hours ahead of Tehran.
- When is the best time to call from Tehran to Tokyo?
- The best time to call is during overlapping business hours (9 AM – 5 PM) in both cities. Use the interactive converter on this page to visually compare hours side by side.
- Does the time difference change with daylight saving time?
- The time difference may change when either city enters or exits daylight saving time. Tehran uses IRST and Tokyo uses JST.