Kajiwara left the Nihon Ki-in in 1947 with seven other professionals to create a rival organization, the Igo Shisha.

He challenged for the Oza title, the sixth largest in Japan, in 1964.

A year later in 1965, he led a group of players to China, where he helped develop the Chinese fuseki.

He, along with Hideyuki Fujisawa and Toshiro Yamabe made up the group of "three crows" (triumvirate) of the post-war generation.

He thus played an important role in the development of the dominant Kitani-school players in the last quarter of the 20th century.