Soa (year of birth and death unknown) was a priest in the Muromachi period and the seishi (senior envoy) headed the first Envoy Ships Dispatched to Ming China by the Muromachi bakufu (Japanese feudal government headed by a shogun).
祖阿（そあ、生没年不詳）は、室町時代の僧侶で、室町幕府の第1回遣明船の正使。