American Airlines has filed with the U.S. Department of Transportation to operate nonstop service from San Jose to Tokyo . . . Hospital Corp. of America shareholders overwhelmingly approved selling the nation’s largest hospital management company to a management-led group for $5 billion . . . H.F. Ahmanson & Co. signed a definitive agreement to sell its National American Life Insurance Co. of California unit to Riverside Group Inc. of Jacksonville, Fla., for $27.5 million, including $24.5 million in cash.