Northwest Airlines has asked the U.S. Transportation...

Northwest Airlines has asked the U.S. Transportation Department for authority to become the first U.S. airline to fly passengers and cargo between Honolulu and Nagoya, Japan . . . United National Bank in Sioux Falls, S.D., has changed its name to First Interstate Bank of South Dakota N. A. as part of a franchise agreement with Los Angeles-based First Interstate Bancorp . . . Walt Disney Co. said it has completed the purchase of Childcraft Education Corp. from French publisher Hachette SA for $52 million, subject to certain adjustments . . . New World Entertainment, Los Angeles, said it again extended its debt exchange offers for its 11% subordinated notes due Nov. 1, 1995 and its 12% subordinated sinking-fund debentures, due Sept. 15, 1998, to 5 p.m., EDT June 2 . . . Cineplex Odeon Corp. of Toronto purchased the 10-screen Maybox Movie Centre on the outskirts of London for an undisclosed price . . . In an SEC filing, General Cinema Corp. disclosed that certain of its credit agreements have been amended to allow it borrow up to $1 billion to purchase shares of Cadbury Schweppes PLC. . . Amfac Inc. announced that it has retained the Honolulu law firm of Goodsill Anderson Quinn & Stifel as legal counsel and the investment banking firms of Morgan Stanley & Co. and Salomon Bros. as financial advisers to evaluate a proposed management buyout offer made May 18.