Portsmouth to Tokyo time converter

Tokyo is 13 hours ahead of Portsmouth. When it is 9:00 AM in Portsmouth, it is 10:00 PM in Tokyo.

Portsmouth EDT

Wednesday, October 21, 2026

Tokyo JST

Thursday, October 22, 2026

Portsmouth
New Hampshire, United States
Wed, Oct 21
EDTUTC-4
Tokyo
Japan
Thu, Oct 22
JSTUTC+9+13h
Finding your time zone…
Shared working hours (9:00–18:00)

Portsmouth to Tokyo conversion table

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

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 8:00 PM – 10:00 PM in Portsmouth (9:00 AM – 11:00 AM in Tokyo): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference changes during the year because Portsmouth and Tokyo switch clocks on different dates:

  • Oct 21, 2026 – Nov 1, 2026: +13h
  • Nov 1, 2026 – Mar 14, 2027: +14h
  • Mar 14, 2027 – Oct 21, 2027: +13h

Distance

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

More conversions

Tokyo to PortsmouthPortsmouth to New YorkPortsmouth to LondonPortsmouth to Los AngelesPortsmouth to ChicagoPortsmouth to TorontoPortsmouth to São PauloPortsmouth to ParisPortsmouth to BerlinPortsmouth to MoscowPortsmouth to DubaiPortsmouth to New DelhiPortsmouth to Bangkok
New York to TokyoLondon to TokyoLos Angeles to TokyoChicago to TokyoToronto to TokyoSão Paulo to TokyoParis to TokyoBerlin to TokyoMoscow to TokyoDubai to TokyoNew Delhi to TokyoBangkok to Tokyo

Questions and answers

What is the time difference between Portsmouth and Tokyo?

Tokyo is 13 hours ahead of Portsmouth.

What time is it in Tokyo when it is 9 AM in Portsmouth?

When it is 9:00 AM in Portsmouth, it is 10:00 PM in Tokyo.

When is the best time to call Tokyo from Portsmouth?

Working hours don't overlap fully. The closest fit is 8:00 PM – 10:00 PM in Portsmouth (9:00 AM – 11:00 AM in Tokyo): working hours on one side, early or late on the other.

Does the time difference between Portsmouth and Tokyo change?

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