MeanwhileJST to IRST converter
Japan Time (Tokyo, Osaka) to Iran Time (Tehran).
IRST is 5 h 30 min behind JST.
9:00 AM JST = 3:30 AM IRST same day
Best time to meet
The best time to meet is between 3:00 PM and 5:00 PM JST, which is 9:30 AM to 11:30 AM IRST. Both sides are then inside 9 AM to 5 PM.
JST to IRST time table
For 31 Oct 2026. Green rows: both sides between 9 AM and 5 PM.
| JST | IRST |
|---|---|
| 12:00 AM JST | 6:30 PM IRST previous day |
| 1:00 AM JST | 7:30 PM IRST previous day |
| 2:00 AM JST | 8:30 PM IRST previous day |
| 3:00 AM JST | 9:30 PM IRST previous day |
| 4:00 AM JST | 10:30 PM IRST previous day |
| 5:00 AM JST | 11:30 PM IRST previous day |
| 6:00 AM JST | 12:30 AM IRST |
| 7:00 AM JST | 1:30 AM IRST |
| 8:00 AM JST | 2:30 AM IRST |
| 9:00 AM JST | 3:30 AM IRST |
| 10:00 AM JST | 4:30 AM IRST |
| 11:00 AM JST | 5:30 AM IRST |
| 12:00 PM JST | 6:30 AM IRST |
| 1:00 PM JST | 7:30 AM IRST |
| 2:00 PM JST | 8:30 AM IRST |
| 3:00 PM JST | 9:30 AM IRST |
| 4:00 PM JST | 10:30 AM IRST |
| 5:00 PM JST | 11:30 AM IRST |
| 6:00 PM JST | 12:30 PM IRST |
| 7:00 PM JST | 1:30 PM IRST |
| 8:00 PM JST | 2:30 PM IRST |
| 9:00 PM JST | 3:30 PM IRST |
| 10:00 PM JST | 4:30 PM IRST |
| 11:00 PM JST | 5:30 PM IRST |
Quick answers
- 9:00 AM JST = 3:30 AM IRST
- 12:00 PM JST = 6:30 AM IRST
- 3:00 PM JST = 9:30 AM IRST
- 5:00 PM JST = 11:30 AM IRST
- 9:00 AM IRST = 2:30 PM JST
- 12:00 PM IRST = 5:30 PM JST
- 5:00 PM IRST = 10:30 PM JST
Does the gap change during the year?
No. IRST is 5 h 30 min behind JST all year.
JST does not change its clocks. IRST does not change its clocks.
About JST and IRST
JST here means Japan Time, the clock in Tokyo, Osaka. Right now it is UTC+9. It has no daylight saving.
IRST here means Iran Time, the clock in Tehran. Right now it is UTC+3:30. It has no daylight saving.
Every city on your wrist
Meanwhile puts these times in your Mac menu bar, on your iPhone home screen and on your Apple Watch. Type “3pm Tokyo” and every city answers. Free for 3 cities. Unlock every city on every device once for $4.99, shared with your family. No subscription.
Coming soonMore conversions
JST to EST JST to CST JST to MST JST to PST JST to AKST JST to HST JST to AST JST to NST JST to BRT JST to ART JST to COT JST to CLT JST to UTC JST to GMT JST to BST JST to CET JST to EET JST to MSK JST to TRT JST to SAST JST to WAT JST to EAT JST to GST JST to AFT JST to PKT JST to IST JST to NPT JST to BDT JST to ICT JST to WIB JST to SGT JST to HKT JST to PHT JST to KST JST to AWST JST to ACST JST to AEST JST to NZST
Time in Tokyo Time in Yokohama Time in Osaka Time in Nagoya Time in Sapporo Time in Fukuoka Time in Kawasaki Time in Kobe Time in Tehran Time in Mashhad Time in Isfahan Time in Karaj Time in Tabriz