JST to Koch'ang Time Converter
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Quick answers
Selected conversion
9:00 pm21:00 JST (UTC+9), Oct 13, 2026 = 9:00 pm21:00 KST (UTC+9), Oct 13, 2026
JST and Koch'ang have the same local time.
How the time difference changes
JST and Koch'ang have the same time year-round.
Working hours of 9:00 am to 5:00 pm in JST correspond to 9:00 am to 5:00 pm in Koch'ang.Working hours of 09:00 to 17:00 in JST correspond to 09:00 to 17:00 in Koch'ang.
Compare JST time with Koch'ang time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Japan Standard Time and KST (Korea Standard Time) have the same local time.
9:00 pm21:00 in JST is 9:00 pm21:00 in Koch'ang, South Korea
JST to Koch'ang call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in JST which corresponds to 9am-5pm09:00-17:00 in Koch'ang
9:00 pm21:00 Japan Standard Time (JST). Offset UTC +9:00 hours
9:00 pm21:00 KST (Korea Standard Time) (Koch'ang, South Korea). Offset UTC +9:00 hours
9:00 pm21:00 JST / 9:00 pm21:00 Koch'ang, South Korea
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| JST | Koch'ang, South Korea |
|---|---|
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| 23:00 |
Japan Standard Time
Offset: JST is 9 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Japan
Principal Cities: The largest city in the JST time zone is Tokyo in Japan, with about 9.733 million people. Other major cities in this time zone include Yokohama, Osaka, Nagoya, Sapporo.
Daylight Saving: Clocks in Japan Standard Time (JST) do not change for daylight saving time, so JST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
JST representations, usage and related time zones
- +09 - basic short
- +0900 - basic
- +09:00 - extended
- +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
- India - Military abbreviation for JST
- I - short form of 'India'
- Asia/Tokyo
- Japan
- AWDT - Australian Western Daylight Time
- CHOST - Choibalsan Summer Time
- I - India Time Zone
- IRKST - Irkutsk Summer Time
- JST - Japan Standard Time
- KST - Korea Standard Time
- PWT - Palau Time
- TLT - East Timor Time
- ULAST - Ulaanbaatar Summer Time
- WIT - Eastern Indonesian Time
- YAKT - Yakutsk Time