Convert KST to JST — Time Difference Between Korea Standard Time and Japan Standard Time
Drag the slider or click the time display to type a specific hour and instantly convert KST to JST — Japan Standard Time and Korea Standard Time are in the same timezone. Scroll down to browse the full KST to JST conversion table, check what time 9 AM, 10 AM, 11 AM, or 12 PM in Seoul is in Tokyo, and use the date picker to compare times on any day for accurate scheduling.
KST
Korea Standard Time
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JST
Japan Standard Time
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KST to JST Time Zone Difference — Hour-by-Hour Conversion Table
Scan each row to find what time any hour in Seoul is in Tokyo — tap the arrows to jump between days, click "Today" to reset, and use the color-coded bands to quickly spot overlapping work hours, early mornings, and late nights at a glance.
| KST (Seoul) | JST (Tokyo) |
|---|
How to Convert KST to JST
Drag the slider on the KST timeline to pick your time — the JST time updates instantly. You can also click the time display to type a specific hour or pick one from the 15-minute interval dropdown, and use the date picker to check a different day.
What Is the Time Difference Between KST and JST?
Korea Standard Time (KST) and Japan Standard Time (JST) share the same UTC offset (UTC+9:00), so there is no time difference between Seoul and Tokyo.
What Time Is It Now in Seoul?
What Time Is It Now in Tokyo?
KST to JST Meeting Planner
Use the color-coded table above to find overlapping work hours between Seoul and Tokyo. Amber rows mark daytime hours — pick a slot that falls in amber on both sides for a meeting that works for everyone.
Why Trust This KST to JST Converter?
Timezoney uses the IANA Time Zone Database — the same source that powers your phone and computer — so every conversion handles daylight saving transitions and half-hour offsets automatically.
Korea Standard Time
- Abbreviation
- KST
- UTC Offset
- UTC+9:00
- City
- Seoul
- Country
- South Korea
Japan Standard Time
- Abbreviation
- JST
- UTC Offset
- UTC+9:00
- City
- Tokyo
- Country
- Japan