豊後国
In the Edo period, Tōzen-ji was considered the family temple of various clans, including the Date clan of Sendai. Other clans considering Tōzen-ji to have been a clan temple were the Ikeda clan of Ōmi Province, the Inaba clan of Usuki Domain in Bungo Province, the Suwa clan of Shinshū, the Tamura of Ichinoseki, and the Mōri clan of Saeki in Bungo Province.