JST to KST time converter
Korea Standard Time (KST) is the same time as Japan Standard Time (JST) all year round. Use the grid below to line up Tokyo and Seoul: drag the cursor across the day, and working hours (9 AM–5 PM) are highlighted in every row so you can spot a slot that suits both sides.
Right now it is 18:43 JST in Tokyo and 18:43 KST in Seoul.
Tue, Oct 20
Tokyo home
18:43
Tue, Oct 20 · UTC+9
Seoul
18:43
Tue, Oct 20 · UTC+9
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
JST to KST: frequently asked
What is the time difference between JST and KST?
Korea Standard Time (KST) is the same time as Japan Standard Time (JST) all year round.
What time is 9 AM JST in KST?
9:00 AM JST is 9:00 AM KST.
When do working hours overlap between Tokyo and Seoul?
Both sides are within 9:00 AM–5:00 PM working hours between 9:00 AM and 5:00 PM JST (9:00 AM to 5:00 PM KST).