This author has not been identified. Look up 'Yu Ogura' in GoogleThis author has not been identified. Look up 'Masakazu Fujii' in GoogleThis author has not been identified. Look up 'Kazuyuki Nishijima' in GoogleThis author has not been identified. Look up 'Hiroki Murakami' in GoogleThis author has not been identified. Look up 'Mitsuharu Sonehara' in Google