In 1954, the nishin-gura Storehouse, in which the Tenguto members were imprisoned, was moved to the precincts of a shrine and now it is a memorial museum for the patriots of the Mito Domain, called 'kaitenkan.'
昭和29年には、天狗党員が監禁された鰊蔵が境内に移築され「回天館」という水戸烈士記念館となっている。