TOKYO — U.S. and other Western ambassadors to Japan are skipping an atomic bombing peace memorial in Nagasaki on Friday after Israel was not invited over what the city’s mayor said were security concerns.

Diplomats from all over the world are invited to the annual ceremony, which commemorates the day the United States dropped an atomic bomb on the city. U.S. Ambassador Rahm Emanuel and other envoys say excluding Israel puts it on par with Russia and Belarus, which are the only two other…