Koriyama to Porto time converter

Porto is 8 hours behind Koriyama. When it is 9:00 AM in Koriyama, it is 1:00 AM in Porto.

Koriyama JST

Wednesday, October 21, 2026

Porto WEST

Tuesday, October 20, 2026

Koriyama
Japan
Wed, Oct 21
JSTUTC+9
Porto
Portugal
Tue, Oct 20
WESTUTC+1-8h
Finding your time zone…
Shared working hours (9:00–18:00)

Koriyama to Porto conversion table

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

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

Best time to call or meet

Both sides are at work from 5:00 PM – 6:00 PM in Koriyama (9:00 AM – 10:00 AM in Porto).

Daylight saving time and the difference

The difference changes during the year because Koriyama and Porto switch clocks on different dates:

  • Oct 21, 2026 – Oct 25, 2026: -8h
  • Oct 25, 2026 – Mar 28, 2027: -9h
  • Mar 28, 2027 – Oct 21, 2027: -8h

Distance

Koriyama and Porto are 10,729 km (6,667 miles) apart in a straight line.

More conversions

Porto to KoriyamaKoriyama to New YorkKoriyama to LondonKoriyama to Los AngelesKoriyama to ChicagoKoriyama to TorontoKoriyama to São PauloKoriyama to ParisKoriyama to BerlinKoriyama to MoscowKoriyama to DubaiKoriyama to New DelhiKoriyama to Bangkok
New York to PortoLondon to PortoLos Angeles to PortoChicago to PortoToronto to PortoSão Paulo to PortoParis to PortoBerlin to PortoMoscow to PortoDubai to PortoNew Delhi to PortoBangkok to Porto

Questions and answers

What is the time difference between Koriyama and Porto?

Porto is 8 hours behind Koriyama.

What time is it in Porto when it is 9 AM in Koriyama?

When it is 9:00 AM in Koriyama, it is 1:00 AM in Porto.

When is the best time to call Porto from Koriyama?

Both sides are at work from 5:00 PM – 6:00 PM in Koriyama (9:00 AM – 10:00 AM in Porto).

Does the time difference between Koriyama and Porto change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.