JST to KST Time Zone Converter — Japan to Korea

Convert between any time zones worldwide. Free and accurate time zone converter with DST support.

Edit time or date on either side — all cards update instantly.

From

UTC...

Japan Standard Time

To Same day

UTC...

Korea Standard Time

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JST to KST Conversion Chart

Last updated: April 2026

Today's reference — every 3 hours. DST is applied automatically.

JST Time	KST Time
12:00 AM	12:00 AM
3:00 AM	3:00 AM
6:00 AM	6:00 AM
9:00 AM	9:00 AM
12:00 PM	12:00 PM
3:00 PM	3:00 PM
6:00 PM	6:00 PM
9:00 PM	9:00 PM

Popular Timezone Conversions

CST to EST PST to EST MST to EST GMT to EST JST to EST GST to EST IST to EST EST to GMT

About JST to KST Conversion

Last updated: April 2026

Converting time between JST and KST requires understanding their time zone offsets and any daylight saving time adjustments. JST (JST) operates at UTC+9, while KST (KST) is set to UTC+9. Both time zones share the same UTC offset, so the time remains the same in both locations. For example, when it's 10:01 PM JST on May 5, 2026, it's 10:01 PM KST in KST. Use this converter to quickly find the equivalent time in KST for any time in JST, whether you're scheduling meetings, planning travel, or coordinating with teams across different time zones.

How to Use the Time Zone Converter

Last updated: April 2026

Select your source timezone from the "From timezone" dropdown (use search to find quickly)
Enter the date and time you want to convert (or click "Today" and "Now" for current time)
Select your target timezone from the "To timezone" dropdown
The conversion updates automatically as you change inputs - no button needed!
Use "Copy" button to copy the converted time, or use presets for quick conversions

More Conversions from JST

JST to EST JST to CST JST to MST JST to MDT JST to PST JST to AKST JST to HST JST to GMT JST to CET JST to EET JST to MSK JST to IST JST to CST-CHINA JST to HKT JST to SGT JST to GST JST to AEST JST to AWST JST to NZST JST to UTC JST to ART JST to BRT JST to PHT JST to BDT JST to SAST JST to ICT JST to EAT JST to WAT JST to PKT

Frequently Asked Questions

Last updated: April 2026

What is the time difference between JST and KST?

The time difference between JST and KST is 0 hours. KST is 0 hours ahead JST.

Is KST ahead of or behind JST?

KST is ahead of JST by 0 hours. When it's 9 AM in JST, it's 9:00 AM in KST.

How many hours do you add to JST to get KST?

You add 0 hours to JST to get KST. For example, 9 AM JST + 0 hours = 9:00 AM KST.

Does the JST to KST time difference change during Daylight Saving Time?

No, the time difference between JST and KST remains constant throughout the year. Neither timezone observes Daylight Saving Time, so the 0-hour difference stays the same.

What is 9 AM JST in KST?

9 AM JST is 9:00 AM KST. This conversion accounts for the 0-hour time difference between the two timezones.

Is JST the same throughout the year when converting to KST?

Yes, the conversion between JST and KST remains consistent throughout the year. Since neither timezone observes Daylight Saving Time, the 0-hour difference is constant, making conversions predictable and straightforward.

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