The 21st Annual Meeting of The Japan Association of Medical Spectroscopy organized by Prof. Hidetoshi Sato, School of Biological and Environmental Sciences, was held at Kwansei Gakuin Kaikan from 30 to 31 November, 2023. The Japan Association of Medical Spectroscopy was organized to promote application of spectroscopies in medical and biological sciences. More than 110 attendees have gathered from universities, research institutes and ompanies in Kwansei Gakuin and made presentations and discussion regarding biomedical spectroscopy. The meeting contributed promotion and distribution of newest knowledge and technologies of biomedical spectroscopy.