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Convert Iran Time to Japan Time

IRST · UTC+3:30 → JST · UTC+9

IRST is 5 hours 30 minutes behind JST

Tehran · UTC+3:30

Tuesday, 8 September 2026

Tokyo · UTC+9

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
TehranUTC+3:30 · +03:30
0003060912151821
TokyoUTC+9 · +09:00
0508111417202302

Shared working hours: 09:00–12:30 in Tehran is 14:30–18:00 in Tokyo.

Working (09–18) Awake, off the clock Asleep (23–07)

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10:36 Tue 8 Sep Tehran = 16:06 Tue 8 Sep Tokyo

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Hour-by-hour conversion

Tehran (IRST)Tokyo (JST)
00:0005:30
01:0006:30
02:0007:30
03:0008:30
04:0009:30
05:0010:30
06:0011:30
07:0012:30
08:0013:30
09:0014:30Both at work
10:0015:30Now
11:0016:30Both at work
12:0017:30Both at work
13:0018:30
14:0019:30
15:0020:30
16:0021:30
17:0022:30
18:0023:30
19:0000:30next day
20:0001:30next day
21:0002:30next day
22:0003:30next day
23:0004:30next day

About this conversion

IRST here means Iran Time, represented by Tehran (Asia/Tehran), currently UTC+3:30. JST means Japan Time, represented by Tokyo (Asia/Tokyo), currently UTC+9.

Working hours are shown as 09:00–18:00 local, and sleeping hours as 23:00–07:00. The hour table is anchored on the current day in Tehran; day boundaries are marked where the date differs.

Quick answers

  • 09:00 IRST is 14:30 JST
  • 12:00 IRST is 17:30 JST
  • 15:00 IRST is 20:30 JST
  • 18:00 IRST is 23:30 JST

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