Time Difference: Osaka vs Tehran
Osaka
12:02:19 PM JST
Thursday, May 14, 2026
5h 30m
5h 30m
Tehran
6:32:19 AM IRST
Thursday, May 14, 2026
Tehran is 5.5 hours behind Osaka.
Quick Reference
- Osaka
- JST (GMT+9)
No Daylight Saving Time
- Tehran
- IRST (GMT+3:30)
No Daylight Saving Time
Frequently Asked Questions
- What is the time difference between Osaka and Tehran?
- Tehran is 5.5 hours behind Osaka.
- When is the best time to call from Osaka to Tehran?
- 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. Osaka uses JST and Tehran uses IRST.