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Convert Japan Time to Syowa Time

JST · UTC+9 → SYOT · UTC+3

JST is 6 hours ahead of SYOT

Tokyo · UTC+9

Tuesday, 8 September 2026

Syowa · UTC+3

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
TokyoUTC+9 · +09:00
0003060912151821
SyowaUTC+3 · +03:00
1821000306091215

Shared working hours: 15:00–18:00 in Tokyo is 09:00–12:00 in Syowa.

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

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16:06 Tue 8 Sep Tokyo = 10:06 Tue 8 Sep Syowa

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Hour-by-hour conversion

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

About this conversion

JST here means Japan Time, represented by Tokyo (Asia/Tokyo), currently UTC+9. SYOT means Syowa Time, represented by Syowa (Antarctica/Syowa), currently UTC+3.

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 Tokyo; day boundaries are marked where the date differs.

Quick answers

  • 09:00 JST is 03:00 SYOT
  • 12:00 JST is 06:00 SYOT
  • 15:00 JST is 09:00 SYOT
  • 18:00 JST is 12:00 SYOT

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