Otomo Sorin (?? ??, January 31, 1530 – June 11, 1587), also known as Fujiwara no Yoshishige (?? ??) and Otomo Yoshishige (?? ??), was a Japanese feudal lord (daimyo) of the Otomo clan, one of the few to have converted to Roman Catholicism (Christianity).
The eldest son of Otomo Yoshiaki, he inherited the Funai Domain, on Kyushu, Japan's southernmost main island, from his father.
He is perhaps most significant for having appealed to Toyotomi Hideyoshi to intervene in Kyushu against the Shimazu clan, thus spurring Hideyoshi's Kyushu Campaign of 1587.