According to Yasuji Toita, there was the 'Tsurigitsune syle' as well as the versions in which Kudo has the condition of Nyctalopia or a koto (a long Japanese zither with thirteen strings) is played with shoji (opaque sliding screens).
戸板康二によれば、「釣狐の型」や工藤が鳥目になったり、障子で琴を弾いたりするのがあった。