1. Manufacturing Division, Yamasa Corporation, Choshi, Japan
2. NODAI Genome Research Center, Tokyo University of Agriculture, Tokyo, Japan
3. Faculty of Food and Agricultural Sciences, Fukushima University, Fukushima, Japan
4. Institute of Fermentation Sciences, Fukushima University, Fukushima, Japan
5. Department of Fermentation Science, Faculty of Applied Bio-Science, Tokyo University of Agriculture, Tokyo, Japan