スケジュール 2 14:45 〜 15:00 [LDC9-04] Forming Aerial Signage in front of LED Panel by Use of Retro-Reflector with Square-Shaped Holes *Daiki Nishimura1, Masaki Yasugi1,2, Hirotsugu Yamamoto1,2 (1. The University of Utsunomiya, 2. JST, ACCEL)