Conceived as a Japanese playwright's version of an American musical about American influences on Japan, "Pacific Overtures" opens in July 1853. Since the foreigners were expelled from the island empire, explains the Reciter, elsewhere wars are fought and machines are rumbling, but in Nippon they plant rice, exchange bows and enjoy peace and serenity, and there has been nothing to threaten the changeless cycle of their days ("The Advantages of Floating in the Middle of the Sea"). But President Millard Fillmore, determined to open up trade with Japan, has sent Commodore Matthew C. Perry across the Pacific.