A JAL Japan Airlines Boeing 777-300, registration JA743J performing flight JL-6 from Tokyo Haneda (Japan) to New York JFK,NY (USA) with 233 passengers and 15 crew, was in the initial climb out of Haneda's runway 34R when the left hand engine (GE90) emitted a series of 5 bangs and streaks of flame. Tower informed the crew about seeing flames . . .