Professor Masaaki is a Professor Emeritus at the National University Corporation Tokyo Gakugei University. He was the director of the National Institute for Educational Policy Research from 2008 – 2012.
He is a distinguished researcher of educational leadership and management in Japan. He is well-known as a distinguished leader for the recovery project of education after the great disaster – East Japan Earthquake in 2011. He was then the director of the Ministry of Education, Science and Culture when the changes happened to recover from the great disaster. In addition to his accomplishments as administrator, he published 3 books on the recovery of education, schools and community, 10 academic articles on recovery education, compensatory education and school restructuring which became the basis for other schools, colleges and universities.