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Time difference between Boston and Osaka

Osaka is 13 hours ahead of Boston.

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

Boston to Osaka time converter

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

BostonOsaka
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 Osaka?

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

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

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

When is the best time to call Osaka 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 Osaka); 7:00 PM–10:00 PM in Boston (8:00 AM–11:00 AM in Osaka), when both places are awake.

Does the time difference between Boston and Osaka change?

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

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

Time difference from Boston to other cities

All Boston time differences →

Time difference from Osaka