Copenhagen is 7 hours behind Osaka
Best overlap: 3:00 PM to 6:00 PM in Osaka is 8:00 AM to 11:00 AM in Copenhagen.
Aim for 3:00 PM to 6:00 PM Osaka time — that's 8:00 AM to 11:00 AM over in Copenhagen. With 3 hours of overlap, 3:00 PM in Osaka (8:00 AM in Copenhagen) is a comfortable, repeatable slot for both sides. These times hold for most of the year, but Copenhagen's daylight saving (which Osaka doesn't use) shifts them by an hour twice annually.