He was born in Kyoto in 1923, the year of the Great Kanto Earthquake, as the eldest son of the 14th head of the Urasenke tea school. While a student at Doshisha University, he was drafted into the Imperial Japanese Navy through the student mobilization program during World War II. While there, he was chosen to become a kamikaze pilot, but he survived the war because he was not deployed on a suicide mission. In 1949, he was ordained at Daitokuji temple, the family's ancestral temple in Kyoto's Kita Ward. In 1950, he became the "wakasosho" heir apparent, and began traveling across the United States to promote the way of tea. After the death of the 14th head, he succeeded as the 15th Urasenke head in 1964. He retired in 2002, passing the iemoto position to his eldest son and adopting the honorary name Sen Genshitsu. Sen Soshitsu XV devoted himself to "tea diplomacy." One notable occasion was in 1986, when he served tea to then-Prince Charles and the late Princess Diana during their visit to Kyoto.