Although records of the fact that he was engaged in painting around 1473 are existent, no paintings by Sotan have been discovered so far except for the fusuma-e of Yotokuin in Daitoku-ji Temple which Sokei, his son, completed based on what Sotan left unfinished.
1473年（文明5年）頃までの作画の記録は残っているが､宗湛作の遺品は発見されておらず、宗湛の書き残したものを子の宗継が完成させた大徳寺養徳院の襖絵のみである。