Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata, 997-0017, Japan. haruo@g-language.org|Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata, 997-0017, Japan. haruo@g-language.org|Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata, 997-0017, Japan. haruo@g-language.org