TOKYO -- Takuya Otani would love an MBA from a top U.S. business school, but he won't apply. When he graduates from college in Tokyo next year, he'll pass on an American degree and attend graduate school in Japan. "I am a grass-eater," Otani said wistfully, using an in-vogue expression for a person who avoids stress, controls risk and grazes contentedly in home pastures. Once a voracious consumer