1. School of Home Economics, Otsuma Women’s University, Sanban‐cho, Chiyoda‐ku, Tokyo 102‐8357, Japan
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2. Technical Center, DyStar Japan Ltd., Shinkai‐machi 2‐65, Omuta, Fukuoka‐ken 836‐0017, Japan
3. Tobu Department Store, Nishi‐ikebukuro, Toshima‐ku, Tokyo 171‐8512, Japan
4. Tokyo University of Agriculture and Technology, Koganei, Tokyo 184‐8588, Japan