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Time difference between Osaka and Boston

Boston is 13 hours behind Osaka.

Osaka
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 Osaka

Osaka to Boston time converter

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

OsakaBoston
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 Osaka and Boston?

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

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

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

When is the best time to call Boston from Osaka?

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

Does the time difference between Osaka and Boston change?

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

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

Time difference from Osaka to other cities

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Time difference from Boston