Classic Radio Calisthenics is a collaborative project with the Japan Philharmonic Orchestra, pairing Radio Taiso—a beloved Japanese morning exercise routine broadcast since 1928—with live string quartet performances. Launched at Roppongi Art Night 2017, the program took place at sunrise in public spaces across the city.

Each year's musical selections reflected the festival's theme and social context. Through this embodied, participatory ritual, the project invited participants to experience the hidden side of Roppongi—its everyday rhythms and the quiet flow of time that the city rarely shows.