Ganshin Rock graduated from a grammar school in London, specializing in English. During World War II, he served as a glider pilot since he had studied aeronautical engineering. After the war, he lived in Japan as a corporate executive for a telecommunication company in Tokyo.
During the period from 1982 to 1986, Reverend Ganshin regularly attended the Buddhist English Academy, where he met Professor Ichishima at his temple in Chiba.
Having returned to the UK in 1986, he started his service to propagate Buddhism at his private residence, and enshrined the Yakushi Nyorai he had obtained 40 years before.
In 1982, he was appointed Consultant to Bukkyō Dendō Kyōkai with the responsibility of disseminating copies of The Teaching of Buddha in hotels, schools, hospitals, and libraries throughout the country and was sometimes asked to give lectures on Buddhism at local schools and other institutions.
Reverend Ganshin was also a member of the Endorsement Authority for Buddhist Chaplains in the UK Armed Forces.
He passed away on Monday 1st September 2014 and received the Kaimyo (posthumous name) of Ten’ei Ganshin Kōji from Ichishima Sensei, meaning the First Tendai Priest of the UK.