Following the unification of Japan during the Edo period, Jōdo Shinshū Buddhism adapted, along with the other Japanese Buddhist schools, into providing memorial and funeral services for its registered members under the Danka system, which was legally required by the Tokugawa shogunate in order to prevent the spread of Christianity in Japan. The "danka seido" system continues to exist today, although not as strictly as in the premodern period, causing Japanese Buddhism to also be labeled as "Funeral Buddhism" since it became the primary function of Buddhist temples. The Honganji also created an impressive academic tradition, which led to the founding of Ryukoku University in Kyoto and formalized many of the Jōdo Shinshū traditions which are still followed today.