Tehran time to Tokyo time
Tokyo is 5.5 hours ahead of Tehran all year (Tehran GMT+3:30/UTC+03:30 in summer; Tokyo GMT+9/UTC+09:00). Enter a Tehran time below to convert it, or leave it blank to see the current time in both cities.
How to use the Tehran to Tokyo time
- Type a Tehran time (24-hour) and optionally a date, or leave blank for now.
- Click Convert.
- Read the Tokyo time and the working-hours table.
Time difference between Tehran and Tokyo
Tokyo is 5.5 hours ahead of Tehran all year. Neither city changes its clocks, so the difference is the same all year. Tehran uses Asia/Tehran time (UTC+03:30 in January, UTC+03:30 in July); Tokyo uses Asia/Tokyo (UTC+09:00 in January, UTC+09:00 in July).
Working week in Tehran and Tokyo
Tehran: Iran Standard Time, UTC+3:30 all year (daylight saving was abolished in 2022). Weekend is Friday, with Thursday a half day for many; the week starts Saturday.
Tokyo: Japan Standard Time, UTC+9 all year; Japan has never adopted daylight saving. Office hours 09:00–18:00, weekend Saturday–Sunday; Golden Week (late April–early May) and Obon (mid-August) are holiday periods.
Quick conversion table (summer difference)
| Tehran | Tokyo |
|---|---|
| 08:00 | 13:30 |
| 09:00 | 14:30 |
| 10:00 | 15:30 |
| 12:00 | 17:30 |
| 14:00 | 19:30 |
| 16:00 | 21:30 |
| 18:00 | 23:30 |
| 20:00 | 01:30 (next day) |
| 22:00 | 03:30 (next day) |
Table uses the July difference; the tool above applies the exact rule for any date.
Best time to call between Tehran and Tokyo
Within normal office hours (09:00–18:00) in both cities: 9:00–12:00 Tehran time. For a compromise outside that window, the fairest slots are the ones nearest each side's start or end of day, alternating who takes the inconvenient hour.
Reverse
Need the other direction? See Tokyo to Tehran, or the general time zone converter.
Frequently asked questions
How many hours ahead is Tokyo from Tehran?
Tokyo is 5.5 hours ahead of Tehran all year.
When it is 12:00 noon in Tehran, what time is it in Tokyo?
17:30 in summer (); use the tool for a specific date.
Does the converter handle daylight saving?
Yes, for the exact date you enter, using the IANA time-zone rules in your browser.
Privacy
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Last updated 2026-09-23.