 Sensō Sōshitsu

, also known as , is the 4th in the hereditary series of Japanese tea masters who have been head of the Urasenke family.Although he was the first person in the Sen family to use the name "Sōshitsu" which has been the exclusive hereditary professional name of the head of the Urasenke line of the family ever since, he is counted as Sōshitsu IV to distinguish him as the 4th generation in this line, which, as do the other three lines of the Sen family, counts its founder as Sen no Rikyū.