It was Sorin OTOMO that calmed down the situation in the eastern Kitakyushu region where the powers of the Ouchi clan and the Mori clan competed in addition to the local clan and shugo daimyo (shugo (Japanese provincial military governors) that became daimyo (Japanese feudal lords)) in the Sengoku period.
土豪・守護大名に加え大内氏や毛利氏の勢力が錯綜する戦国の北九州東部を平定したのが、大友宗麟である。