The color painting on silk of Izuna-gongen deposited by Okayama Prefectural Museum is presumed to have been created in the Muromachi period, and the name Takuzen of the period of the Northern and Southern Courts (Japan) to Muromachi is found on Izuna-mandara-zu transmitted at Rinno-ji Temple on Mt. Nikko.
また、岡山県立博物館寄託の飯縄権現図は絹本著色で室町期の作と推定されており、日光山輪王寺伝来の「伊須那曼荼羅図」には南北朝～室町期の貞禅の名が見える。