HARUKI MURAKAMI would seem the very picture of the Japanese writer-prophet. He gazes out over the rooftops of Tokyo's chic suburb of Ayoama, speaking in low, urgent tones about Japan's rightward lurch. "I am worrying about my country," says the 57-year-old writer, widely considered Japan's Nobel laureate-in-waiting. "I feel I have a responsibility as a novelist to do something." He is particularly