Gregorian Chant No writing or markings. Mr. Yoshio Mizushima, the author of the Gregorian Chant, is known as a leading figure in the study and performance of Gregorian chant in Japan. He leads the "St. Gregory's House Choir" and has been involved in the performance of religious music, especially Christmas Mass. As part of his research, he has published translated books focusing on the semiology (semiotics) and rhythmic interpretation of Gregorian chant, a masterpiece that focuses on the power of words in music and their rhythmic interpretation. The St. Gregory's House Choir, under his direction, has recorded many Christmas Mass songs and other religious ceremony songs, and their deep faith and musicality are highly regarded. #MedievalMusic #Gregorian #Rhythm