 Another important researcher in this field, Prof. Yoshiharu Akishige, promoted Zen Psychology, the idea that the insights of Zen should not just be studied but that they should inform psychological practice.Research in this field continues with the work of Japanese psychologists such as Akira Onda and Osamu Ando.In Japan, a popular psychotherapy based on Buddhism is Naikan therapy, developed from Jōdo Shinshū Buddhist introspection by Ishin Yoshimoto (1916–1988).