Tokyo to Seoul Time
JST to KST Converter — 9 AM JST is 9:00 AM KST
Tokyo and Seoul are in the same time zone. Convert any time between Tokyo (JST) and Seoul (KST) instantly.
Tokyo
Japan
Seoul
South Korea
Add Time Zones to Compare
Time Zone Comparison
Tokyo to Seoul Time Conversion Table
| Tokyo (JST) | Seoul (KST) |
|---|---|
| 12:00 AM | 12:00 AM |
| 2:00 AM | 2:00 AM |
| 4:00 AM | 4:00 AM |
| 6:00 AM | 6:00 AM |
| 8:00 AM | 8:00 AM |
| 10:00 AM | 10:00 AM |
| 12:00 PM | 12:00 PM |
| 2:00 PM | 2:00 PM |
| 4:00 PM | 4:00 PM |
| 6:00 PM | 6:00 PM |
| 8:00 PM | 8:00 PM |
| 10:00 PM | 10:00 PM |
Tokyo & Seoul — Business & Scheduling Guide
Tokyo (Japan) is the world's third-largest economy, with key industries in automotive, electronics, robotics, and precision instruments. Seoul (South Korea) is a technology-driven economy known for rapid innovation, known for semiconductors, automotive, shipbuilding, and K-content. With a zero time difference, professionals frequently schedule cross-border calls between these two cities for international trade, remote team collaboration, and client meetings.
Scheduling Meetings Between Tokyo and Seoul
Since Tokyo and Seoul share the same UTC offset, scheduling meetings is straightforward — any time that works in one city works in the other. Japanese business culture places high value on respect and hierarchy, with typical hours of 9 AM–6 PM. South Korean work culture is fast-paced with typical hours of 9 AM–6 PM, though recent reforms have reduced maximum weekly hours. Keep in mind that if one city observes Daylight Saving Time and the other doesn't, the effective difference can shift by 1 hour during parts of the year.
Daylight Saving Time Considerations
Neither Tokyo nor Seoul observes Daylight Saving Time — Tokyo stays on JST and Seoul stays on KST year-round. This makes scheduling between these two cities simpler, as the time difference remains constant throughout the year with no DST surprises.
JST to KST — Quick Reference
JST (JST) stands for the timezone used in Tokyo, Japan (UTC+9). KST (KST) is the timezone used in Seoul, South Korea (UTC+9). Tokyo and Seoul are in the same time zone.
To convert JST to KST, both zones are at the same time. For example, JST 9:00 AM = KST 9:00 AM.
Key Facts
- •Time difference: Tokyo and Seoul share the same standard UTC offset.
- •Daylight Saving Time: Tokyo does not observe DST (JST). Seoul does not observe DST (KST).
- •Regions: Tokyo is located in Japan and uses the JST time zone. Seoul is located in South Korea and uses the KST time zone.
- •Best time to call: The best time to call between Tokyo and Seoul is 9:00 AM to 4:00 PM in Tokyo time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Tokyo and Seoul?
Tokyo and Seoul are in the same time zone.
What time is it in Seoul when it's 9 AM in Tokyo?
When it's 9:00 AM in Tokyo, it is 9:00 AM in Seoul.
What time is 9 PM JST in KST?
9 PM JST (Tokyo time) is 9:00 PM KST (Seoul time). This is a common time people check when scheduling evening calls across these two time zones.
When is the best time to schedule a meeting between Tokyo and Seoul?
The best time to schedule a meeting is between 9:00 AM to 4:00 PM in Tokyo time, when both cities are within standard working hours (9 AM – 5 PM). This gives you the maximum overlap window for real-time collaboration.
How do I convert JST to KST?
JST (JST) is the timezone for Tokyo, Japan (UTC+9). KST (KST) is the timezone for Seoul, South Korea (UTC+9). Tokyo and Seoul are in the same time zone. Quick examples: 9 AM JST = 9:00 AM KST, 12 PM JST = 12:00 PM KST, 3 PM JST = 3:00 PM KST, 6 PM JST = 6:00 PM KST.
Is Tokyo ahead of or behind Seoul?
Tokyo and Seoul are in the same UTC offset — neither is ahead or behind.
Does Tokyo or Seoul change clocks for Daylight Saving Time?
No, Tokyo does not observe DST — it stays on JST year-round. Seoul does not observe DST — it stays on KST year-round.
Related Time Zone Conversions
More from Tokyo
Convert to Seoul
Working across time zones?
Auto-sync calendar events into your timesheet — no matter what time zone your team is in. Connect Google Calendar, Teams, or Zoom and export a polished timesheet in seconds.
No credit card required. Free forever plan available.