South Korea and Japan are in the same timezone. Midday in South Korea lines up with 12:00 in Japan.
South Korea is in the Asia/Seoul timezone. Japan is in Asia/Tokyo. The difference is 0 hours.
Business hours comparison
There is a 8-hour window each day where both South Korea and Japan are within standard business hours (09:00–17:00).
00:0006:0012:0018:0024:00
South Korea
Japan
Overlap (8h)
When to schedule across time zones
Both South Korea and Japan are in standard hours simultaneously for 8h per day. 3 recommended slots shown below.
09:00 Seoul / 09:00 Tokyo✓ Both working
10:00 Seoul / 10:00 Tokyo✓ Both working
11:00 Seoul / 11:00 Tokyo✓ Both working
Based on standard 09:00–17:00 working hours in each location's local time.
Upcoming public holidays
⚡ Watch out — upcoming holidays on both sides. Verify availability in advance.
South Korea6 holidays
Sep 24ChuseokSOON
Sep 25ChuseokSOON
Sep 26ChuseokSOON
Oct 3National Foundation DaySOON
Oct 9Hangul Day
Japan5 holidays
Sep 21Respect for the Aged DayTODAY
Sep 23Autumnal Equinox DaySOON
Oct 12Sports Day
Nov 3Culture Day
Nov 23Labour Thanksgiving Day
How to work with South Korea and Japan time zones
Working across South Korea (South Korea) and Japan (Japan) involves a 0-hour gap. The good news: there is a 8-hour mutual window in standard business hours that lets both sides collaborate without anyone joining at an unreasonable hour.
💡 How to schedule across these time zones
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09:00–10:00 in South Korea = 09:00–10:00 in Japan. Both sides are in standard business hours during this window.
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10:00–11:00 in South Korea = 10:00–11:00 in Japan. Both sides are in standard business hours during this window.
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11:00–12:00 in South Korea = 11:00–12:00 in Japan. Both sides are in standard business hours during this window.
DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.
Use the time slider above to find the exact equivalent time for any moment in South Korea. The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.
