1. Rice Research Institute, Kameda Seika Co., Ltd., Niigata 950-0198, Niigata, Japan
2. Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
3. Department of Applied Genomics, Kazusa DNA Research Institute, 2-6-7 Kazusakamatari, Kisarazu 292-0818, Chiba, Japan
4. Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Uji 611-0011, Kyoto, Japan