Chitsū (智通) was a priest of the Hosso School of Japanese Buddhism.
The Soka Gakkai Dictionary of Buddhism (2002) in mentioning Chitatsu, Hsyan-tsang, Tz'u-en, Dosho, Yamato Province, states that Chitsū was: A priest of the Dharma Characteristics (Hosso) school in Japan.
In 658, together with Chitatsu, he went to China and studied the doctrine of the Dharma Characteristics school under Hsyan-tsang and his disciple Tz'u-en.
This is known as the second transmission of the doctrine to Japan, following that of Dosho, who went to China in 653 and studied under Hsyan-tsang.
Chitsubuilt Kannon-ji temple in Yamato Province to spread the Dharma Characteristics doctrine.