When Tadayori MATSUDAIRA, the commissioner of temples and shrines, resigned and was succeeded by Sukeyoshi OTA, OTA met with senior councilor Okitsugu TANUMA and decided that, in light of the distinguished contributions Zojo-ji Temple and the other Jodoshu sect temples had made to the bakufu, 'the Ikkoshu' would be the formal name of the sect which Shinran had founded.
翌年松平忠順が寺社奉行を辞任して太田資愛が後任となると、老中田沼意次と協議して増上寺をはじめとする浄土宗寺院の幕府への貢献が格別であるとして正式に「一向宗」を正式な宗派名とする事を決定した。