A Japan Airlines jetliner with 228 passengers was forced to turn around for an emergency landing in Tokyo on Wednesday after the aircraft's right engine shut down during a flight to the northern Hokkaido island, Reuters quoted an airline spokesman as saying. The Boeing 777, powered by Pratt & Whitney engines, landed safely at Tokyo's Haneda airport, the spokesman said, with no injuries reported. The cause of the engine shutdown was as yet unknown, he added.