LOS ANGELES Japanese stocks rallied out of the open Friday on the back of U.S. gains overnight and successful bond auctions in Europe. The Nikkei Stock Average gained 1% to 8,472.67, and the Topix rose 0.9%, with export-focused auto and motorcycle stocks among the leading gainers. Toyota Motor Corp. rose 1.7%, Honda Motor Co. gained 2.2%, Kawasaki Heavy Industries Ltd. added 2.1%, and Suzuki Motor Corp. advanced 2%. Brokerage shares also firmed, with Nomura Holdings Inc. up 1.2% and Daiwa Securities Group Inc. ahead by 0.8%. Inpex Corp. jumped 2.2% after it and French partner Total SA gave the go-ahead for their massive $34 billion Ichthys gas-export development in Australia.