Japan is 5 hours 30 minutes ahead of Iran. Midday in Japan lines up with 06:00 in Iran.
Japan is in the Asia/Tokyo timezone. Iran is in Asia/Tehran. The difference is 5.5 hours 30 minutes.
Mutual working hours
There is a 2.5-hour window each day where both Japan and Iran are within standard business hours (09:00–17:00).
00:0006:0012:0018:0024:00
Japan
Iran
Overlap (2.5h)
When to schedule across time zones
Both Japan and Iran are in standard hours simultaneously for 2.5h per day.
15:00 Tokyo / 09:00 Tehran✓ Both working
16:00 Tokyo / 10:00 Tehran✓ Both working
Based on standard 09:00–17:00 working hours in each location's local time.
Upcoming public holidays
Japan7 holidays
Jul 20Marine Day
Aug 11Mountain Day
Sep 21Respect for the Aged Day
Sep 23Autumnal Equinox Day
Oct 12Sports Day
Iran
No upcoming public holidays this year.
How to work with Japan and Iran time zones
Working across Japan (Japan) and Iran (Iran) involves a 5.5-hour gap. The good news: there is a 2.5-hour mutual window in standard business hours that lets both sides collaborate without anyone joining at an unreasonable hour.
💡 How to schedule across these time zones
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15:00–16:00 in Japan = 09:00–10:00 in Iran. Both sides are in standard business hours during this window.
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16:00–17:00 in Japan = 10:00–11:00 in Iran. Both sides are in standard business hours during this window.
DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.
Use the time slider above to find the exact equivalent time for any moment in Japan. The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.
