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Time difference between Boston and Tokyo

Tokyo is 13 hours ahead of Boston.

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

Boston to Tokyo time converter

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

BostonTokyo
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 (next day)
12:00 PM1:00 AM (next day)
1:00 PM2:00 AM (next day)
2:00 PM3:00 AM (next day)
3:00 PM4:00 AM (next day)
4:00 PM5:00 AM (next day)
5:00 PM6:00 AM (next day)
6:00 PM7:00 AM (next day)
7:00 PM8:00 AM (next day)
8:00 PM9:00 AM (next day)
9:00 PM10:00 AM (next day)
10:00 PM11:00 AM (next day)
11:00 PM12:00 PM (next day)

Questions

What is the time difference between Boston and Tokyo?

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

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

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

When is the best time to call Tokyo from Boston?

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

Does the time difference between Boston and Tokyo change?

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

Boston is 13 hours behind Tokyo. More: time in Boston · time in Tokyo

Time difference from Boston to other cities

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Time difference from Tokyo