In exchange for retaining their old privileges they had to become Christian and leave their pagan beliefs.
Unno, Taitetsu and James W. Heisig (editors), The Religious Philosophy of Tanabe Hajime: The Metanoetic Imperative (Nanzan Studies in Religion and Culture), Asian Humanities Press (June 1990), ISBN 0-89581-873-6, ISBN 978-0-89581-873-7.