Time zone converter
KST to JST
Convert Korea Time — Seoul to Japan Time — Tokyo — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Seoul, it's 9:00 AM in Tokyo. Tokyo is in the same time as Seoul. Use the converter above to turn any KST time into JST, or scan the hour-by-hour table below for the full day.
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Korea Time — Seoul ·
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Japan Time — Tokyo ·
Convert a specific timein Seoul → — in Tokyo
KST to JST at a glance
9:00 AM KST
9:00 AM
JST · Tokyo
12:00 PM KST
12:00 PM
JST · Tokyo
5:00 PM KST
5:00 PM
JST · Tokyo
Planning a meeting between Seoul and Tokyo
Planning a call between Seoul and Tokyo? The best overlap during a standard 9-to-5 workday runs 9:00 AM–5:00 PM KST (9:00 AM–5:00 PM JST). Aim for that window to reach both sides during business hours.
Hour-by-hour: Seoul to Tokyo
A full day mapped from KST to JST.
Frequently asked
Is Tokyo ahead of or behind Seoul?
Tokyo is in the same time as Seoul.
What is 12:00 PM KST in JST?
12:00 PM in Seoul is 12:00 PM in Tokyo.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so KST and JST automatically reflect the correct daylight-saving offset for the current date.