Koshu to Seoul time converter

Koshu and Seoul are on the same time. When it is 9:00 AM in Koshu, it is 9:00 AM in Seoul.

Koshu JST

Wednesday, October 21, 2026

Seoul KST

Wednesday, October 21, 2026

Koshu
Japan
Wed, Oct 21
JSTUTC+9
Seoul
South Korea
Wed, Oct 21
KSTUTC+9±0
Finding your time zone…
Shared working hours (9:00–18:00)

Koshu to Seoul conversion table

Every hour of today in Koshu and the matching time in Seoul. Light rows are typical working hours (9:00–18:00).

KoshuSeoul
12:00 AM12:00 AM
1:00 AM1:00 AM
2:00 AM2:00 AM
3:00 AM3:00 AM
4:00 AM4:00 AM
5:00 AM5:00 AM
6:00 AM6:00 AM
7:00 AM7:00 AM
8:00 AM8:00 AM
9:00 AM9:00 AM
10:00 AM10:00 AM
11:00 AM11:00 AM
12:00 PM12:00 PM
1:00 PM1:00 PM
2:00 PM2:00 PM
3:00 PM3:00 PM
4:00 PM4:00 PM
5:00 PM5:00 PM
6:00 PM6:00 PM
7:00 PM7:00 PM
8:00 PM8:00 PM
9:00 PM9:00 PM
10:00 PM10:00 PM
11:00 PM11:00 PM

Best time to call or meet

Both sides are at work from 9:00 AM – 6:00 PM in Koshu (9:00 AM – 6:00 PM in Seoul).

Daylight saving time and the difference

The difference stays 0 hours all year.

Distance

Koshu and Seoul are 1,071 km (665 miles) apart in a straight line.

More conversions

Seoul to KoshuKoshu to New YorkKoshu to LondonKoshu to Los AngelesKoshu to ChicagoKoshu to TorontoKoshu to São PauloKoshu to ParisKoshu to BerlinKoshu to MoscowKoshu to DubaiKoshu to New DelhiKoshu to Bangkok
New York to SeoulLondon to SeoulLos Angeles to SeoulChicago to SeoulToronto to SeoulSão Paulo to SeoulParis to SeoulBerlin to SeoulMoscow to SeoulDubai to SeoulNew Delhi to SeoulBangkok to Seoul

Questions and answers

What is the time difference between Koshu and Seoul?

Koshu and Seoul are on the same time.

What time is it in Seoul when it is 9 AM in Koshu?

When it is 9:00 AM in Koshu, it is 9:00 AM in Seoul.

When is the best time to call Seoul from Koshu?

Both sides are at work from 9:00 AM – 6:00 PM in Koshu (9:00 AM – 6:00 PM in Seoul).

Does the time difference between Koshu and Seoul change?

No. The difference stays 0 hours all year.