This author has not been identified. Look up 'Akihisa Okada' in GoogleThis author has not been identified. Look up 'Hiroaki Yoshida' in GoogleThis author has not been identified. Look up 'Kiyosumi Kidono' in GoogleThis author has not been identified. Look up 'Tadayoshi Matsumori' in GoogleThis author has not been identified. Look up 'Takanori Takeno' in GoogleThis author has not been identified. Look up 'Tadashi Kadowaki' in Google