Pilot test of the mutual assistance system using a wearable device for the elderly in WEB3.0 technology. - Kenji Nakamura; Keiichi Yamazaki; Yusuke Arano; Akiko Yamazaki; Hiroshi Koga; Naoya Ohta; Takuya Mitsuhashi; Hideru Obinata; Yoshiaki Ohyama (IIAI-AAI, 2023)