1. Laboratory of Nutrition Chemistry Division of Food Science and Biotechnology Graduate School of Agriculture Kyoto University Oiwake‐cho Kitashirakawa, Sakyo‐ku Kyoto 606‐8502 Japan
2. Functional Brain Science Laboratory Jichi Medical University 3311‐1 Yakushiji, Shimotsuke Tochigi 329‐0498 Japan
3. Research and Development Initiatives Chuo University 1‐13‐27 Kasuga, Bunkyo‐ku Tokyo 112‐8551 Japan