A few examples will illustrate the emergence of vassalage ties between the shōgun Ashikaga Takauji and his new housemen. The Kobayakawa family became loyal vassals when they were entrusted with defending Ashikaga interests in the province of Aki Province after Takauji had retreated to Kyūshū in 1336. Another Aki samurai family, the Mōri clan, became vassals of Takauji in 1336, and served under Kō Moroyasu until the outbreak of the Kannō Incident. In the 1350s, the Mori sided with the enemies of Takauji, Tadayoshi and his adopted son Tadafuyu, and not until the 1360s were they back again as vassals of the shōgun. Vassalage ties to the Kawashima clan and other warrior families near Kyoto were established by Takauji in the summer of 1336 in the latter's drive to retake the capital. The Kawashima case is of considerable interest because of a document pertaining to the terms of vassalage bearing Takauji's signature: they would exchange military service for stewardship rights ("jito shiki") over half of Kawashima Estate, leaving the other half in possession of the noble proprietor in the form of rent.