Osamu Kadowaki was born on 12 February 1964 in Shiogama, Japan. He studied mathematics and composition at the Miyagi University of Education, where he graduated in 1986. He studied composition under Masao Homma and Kazuo Kikkawa. He received his master’s degree in music education in 1995. Since 1986, Kadowaki has taught at public high schools.
He was awarded the Miyagi Prefecture Arts Prize for Young Artist in 1999. He was selected to receive Original Stage Work Prize (Agency for Cultural Affairs) in 2003.
He is a member of The Japan Federation of Composers Inc., Japan Society for Contemporary Music and Japan Society for Electronic Music.