However, Toshichika SAITO, a grandchild of Myochin SAITO, already called himself Dainagon (major counselor); therefore, it is thought that Masayoshi might have succeeded this Jizein family.
ただし、斎藤妙椿の孫の斎藤利親が大納言を名乗っているので、この持是院家を継承したものかもしれない。