JST to KST Converter
KST and JST are on the same time. 9:00 AM JST = 9:00 AM KST.
KST and JST are on the same time. Converting JST to KST leaves the clock unchanged: 9:00 AM JST = 9:00 AM KST.
JST (Japan Time) is used in Japan. KST (Korea Time) is used in South Korea.
JST to KST time conversion table
JST to KST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| JST | KST | Day |
|---|---|---|
| 12:00 AM JST | 12:00 AM KST | night |
| 1:00 AM JST | 1:00 AM KST | night |
| 2:00 AM JST | 2:00 AM KST | night |
| 3:00 AM JST | 3:00 AM KST | night |
| 4:00 AM JST | 4:00 AM KST | night |
| 5:00 AM JST | 5:00 AM KST | night |
| 6:00 AM JST | 6:00 AM KST | — |
| 7:00 AM JST | 7:00 AM KST | — |
| 8:00 AM JST | 8:00 AM KST | — |
| 9:00 AM JST | 9:00 AM KST | work hours |
| 10:00 AM JST | 10:00 AM KST | work hours |
| 11:00 AM JST | 11:00 AM KST | work hours |
| 12:00 PM JST | 12:00 PM KST | work hours |
| 1:00 PM JST | 1:00 PM KST | work hours |
| 2:00 PM JST | 2:00 PM KST | work hours |
| 3:00 PM JST | 3:00 PM KST | work hours |
| 4:00 PM JST | 4:00 PM KST | work hours |
| 5:00 PM JST | 5:00 PM KST | — |
| 6:00 PM JST | 6:00 PM KST | — |
| 7:00 PM JST | 7:00 PM KST | — |
| 8:00 PM JST | 8:00 PM KST | — |
| 9:00 PM JST | 9:00 PM KST | — |
| 10:00 PM JST | 10:00 PM KST | night |
| 11:00 PM JST | 11:00 PM KST | night |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert JST to KST
JST and KST show the same clock time, so no adjustment is needed.
Example: 9:00 AM JST = 9:00 AM KST.
Time difference between JST and KST
The time difference between JST and KST is 0 minutes all year.
JST and KST during daylight saving time
- JST does not observe daylight saving time; it stays on UTC+9 all year.
- KST does not observe daylight saving time; it stays on UTC+9 all year.
Best time for a meeting between JST and KST
JST and KST share 8 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 5:00 PM JST lands between 9:00 AM and 5:00 PM KST, inside working hours for both.
JST to KST FAQ
What is the time difference between JST and KST?
KST and JST are on the same time all year. 9:00 AM JST = 9:00 AM KST.
What is 9 AM JST in KST?
9:00 AM JST is 9:00 AM KST.
What is 12 PM (noon) JST in KST?
12:00 PM JST is 12:00 PM KST.
Is KST ahead of or behind JST?
Neither. KST and JST keep the same clock time.
Does JST change for daylight saving time?
No. JST stays on the same offset all year, so conversions never shift for daylight saving time.
Does KST change for daylight saving time?
No. KST stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between JST and KST?
JST and KST share 8 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 5:00 PM JST lands between 9:00 AM and 5:00 PM KST, inside working hours for both.
Related conversions
Convert KST to JST
Convert JST to other time zones
Convert other time zones to KST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.