Morikiyo assumed control of the [[Ashina clan]] in [[1517]] after his brother [[Ashina Moritaka|Moritaka]] died childless. He assisted [[Date Tanemune]] in an attack on the [[Kasai clan|Kasai]] family in [[1528]] and allied with the [[Date clan|Date]], [[Ishikawa clan|Ishikawa]], and [[Iwase clan|Iwase]] clans against the [[Shirakawa clan|Shirakawa]] in [[1534]].
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Morikiyo assumed control of the [[Ashina clan]] in [[1517]] after his brother [[Ashina Moritaka (b.1448)|Moritaka]] died childless. He assisted [[Date Tanemune]] in an attack on the [[Kasai clan|Kasai]] family in [[1528]] and allied with the [[Date clan|Date]], [[Ishikawa clan|Ishikawa]], and [[Iwase clan|Iwase]] clans against the [[Shirakawa clan|Shirakawa]] in [[1534]].