Watertown to Tokyo time converter

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

Watertown EDT

Monday, October 19, 2026

Tokyo JST

Monday, October 19, 2026

Watertown
Massachusetts, United States
Mon, Oct 19
EDTUTC-4
Tokyo
Japan
Mon, Oct 19
JSTUTC+9+13h
Finding your time zone…
Shared working hours (9:00–18:00)

Watertown to Tokyo conversion table

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

WatertownTokyo
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 Watertown (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 Watertown and Tokyo switch clocks on different dates:

  • Oct 19, 2026 – Nov 1, 2026: +13h
  • Nov 1, 2026 – Mar 14, 2027: +14h
  • Mar 14, 2027 – Oct 19, 2027: +13h

Distance

Watertown and Tokyo are 10,786 km (6,702 miles) apart in a straight line.

More conversions

Tokyo to WatertownWatertown to New YorkWatertown to LondonWatertown to Los AngelesWatertown to ChicagoWatertown to TorontoWatertown to São PauloWatertown to ParisWatertown to BerlinWatertown to MoscowWatertown to DubaiWatertown to New DelhiWatertown 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 Watertown and Tokyo?

Tokyo is 13 hours ahead of Watertown.

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

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

When is the best time to call Tokyo from Watertown?

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

Does the time difference between Watertown 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.