Timezones.in — Stay In Sync

Convert Japan Time to Réunion Time

JST · UTC+9 → RET · UTC+4

JST is 5 hours ahead of RET

Tokyo · UTC+9

Tuesday, 8 September 2026

Saint-Denis · UTC+4

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
TokyoUTC+9 · +09:00
0003060912151821
Saint-DenisUTC+4 · +04:00
1922010407101316

Shared working hours: 14:00–18:00 in Tokyo is 09:00–13:00 in Saint-Denis.

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

Pick a time and share it

16:06 Tue 8 Sep Tokyo = 11:06 Tue 8 Sep Saint-Denis

Open in planner

Post this

XLinkedInWhatsAppFacebookTelegramEmail

Hour-by-hour conversion

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

About this conversion

JST here means Japan Time, represented by Tokyo (Asia/Tokyo), currently UTC+9. RET means Réunion Time, represented by Saint-Denis (Indian/Reunion), currently UTC+4.

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 04:00 RET
  • 12:00 JST is 07:00 RET
  • 15:00 JST is 10:00 RET
  • 18:00 JST is 13:00 RET

Related conversions