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Convert Japan Time to Korean Time

JST · UTC+9 → KST · UTC+9

JST and KST are the same time right now

Tokyo · UTC+9

Tuesday, 8 September 2026

Seoul · UTC+9

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
TokyoUTC+9 · +09:00
0003060912151821
SeoulUTC+9 · +09:00
0003060912151821

Shared working hours: 09:00–18:00 in Tokyo is 09:00–18:00 in Seoul.

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

Pick a time and share it

16:06 Tue 8 Sep Tokyo = 16:06 Tue 8 Sep Seoul

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Hour-by-hour conversion

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

About this conversion

JST here means Japan Time, represented by Tokyo (Asia/Tokyo), currently UTC+9. KST means Korean Time, represented by Seoul (Asia/Seoul), currently UTC+9.

KST is used by 2 zones, including South Korea. See every meaning of KST.

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 09:00 KST
  • 12:00 JST is 12:00 KST
  • 15:00 JST is 15:00 KST
  • 18:00 JST is 18:00 KST

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