Some of the Isshiki clan survived through the Sengoku period for a fairly long time, but in July 1579 Yusai HOSOKAWA defeated the Isshiki clan and thereafter controlled Tango Province.
それでも一色氏の命脈は戦国期を通じて永らえたが、1579年7月に一色氏が細川幽斎に滅ぼされて以来、細川氏が丹後を支配した。