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Time difference between Tokyo and Boston

Boston is 13 hours behind Tokyo.

Tokyo
Japan · Japan Standard Time
4:42 PM
Wednesday, October 21, 2026
Boston
United States · Eastern Daylight Time
3:42 AM
Wednesday, October 21, 2026
Compare more placesBoston to Tokyo

Tokyo to Boston time converter

Green rows are office hours in both places; light green rows are when both are awake.

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

Questions

What is the time difference between Tokyo and Boston?

Boston is 13 hours behind Tokyo. Tokyo is on UTC+9 and Boston is on UTC−4.

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

When it is 9:00 AM in Tokyo, it is 8:00 PM the previous day in Boston.

When is the best time to call Boston from Tokyo?

There are no shared office hours. The most comfortable time to call is 8:00 AM–11:00 AM in Tokyo (7:00 PM–10:00 PM in Boston); 9:00 PM–10:00 PM in Tokyo (8:00 AM–9:00 AM in Boston), when both places are awake.

Does the time difference between Tokyo and Boston change?

Yes. Because of daylight saving time, the difference changes on Sunday, November 1, 2026, when Boston will be 14 hours behind Tokyo.

Tokyo is 13 hours ahead of Boston. More: time in Tokyo · time in Boston

Time difference from Tokyo to other cities

All Tokyo time differences →

Time difference from Boston