It belongs to Jōdo Shinshū, also known as Shin Buddhism (or True Pure Land).
[1] The movement has approximately 5.5 million members.
[2] The headquarters of Ōtani-ha are in Kyoto,[3] the mother temple is Higashi Honganji.
The historic Shōman-ji, Nagoya also belongs to it.
Otani University in Kyoto belongs to Ōtani-ha.