1. Department of Life and Food Sciences Obihiro University of Agriculture and Veterinary Medicine Obihiro 080‐8555 Japan
2. Food and Biodynamic Chemistry Laboratory, Graduate School of Agricultural Science Tohoku University Sendai 980‐0845 Japan
3. Yaizu Suisankagaku Industry Co., Ltd. Shizuoka 425‐8570 Japan
4. Food and Biotechnology Platform Promoting Project, New Industry Creation Hatchery Center (NICHe) Tohoku University Sendai 980‐8579 Japan