國學院大學
Kubota was appointed a member of the Imperial Academy in 1947. He was subsequently a professor at Kokugakuin University. In 1951, he received the NHK Broadcasting Culture Award and became chairman of the Japan Theatre Arts Association the same year. The following year, he became chairman of the Japan Writers' Association and was made a member of UNESCO in Japan. In 1954, he accepted the post of professor at Kyoritsu Women's University. In 1956, Kubota received the Yomiuri Prize for his work "San no tori". In 1957, Kubota was awarded the Order of Culture and was also appointed a Person of Cultural Merit.