1. Research and Development, Manufacturing Group, Food Business Division, Japan Tobacco Inc., 5-14 Haneda Asahicho Ota-ku, Tokyo 144-0042, Japan, and Laboratory of Food Process Engineering, Division of Food Biotechnology, Department of Bioscience and Biotechnology, Graduate School of Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan