This author has not been identified. Look up 'Yasuyuki Nasuhara' in GoogleThis author has not been identified. Look up 'Ken Sakushima' in GoogleThis author has not been identified. Look up 'Akira Endoh' in GoogleThis author has not been identified. Look up 'Reona Umeki' in GoogleThis author has not been identified. Look up 'Hiromitsu Oki' in GoogleThis author has not been identified. Look up 'Takehiro Yamada' in GoogleThis author has not been identified. Look up 'Ken Iseki' in GoogleThis author has not been identified. Look up 'Makoto Ishikawa' in Google