Kōshū Itabashi (板橋 興宗, Itabashi Kōshū, 1927 – 5 July 2020) was a Sōtō Zen master who was the 23rd abbot of Sojiji, abbot of in Takefu, Fukui, and abbot of in Kanazawa, Ishikawa all in Japan. He was born in Tagajo, Miyagi in 1927. He graduated from the in 1945. He also graduated in religious studies at Tohoku University in 1953. He became a Sōtō Zen monk according to . He was trained in Sojiji and he studied under in Hamamatsu, Shizuoka. He succeeded in and became of Sojiji leading monks. He became of Sojijisoin, abbot of Daijoji. He also devised chair Zazen.