Wenxin CAO1)、Yumiko Watanabe-Yasuoka2)、Toshihiro Sashihara2)、Choi HYunjin1)、Masaaki Nishikawa1)、Yasuyuki Sakai1) 1)Department of Chemical System Engineering, Graduate School of Engineering, University of Tokyo 2)Food Microbiology and Function Research Labratories, Research and Development Division. Meiji Co.,Ltd.