Moriuji was the eldest son of Ashina Morikiyo. He expanded the Ashina domain in the face of Uesugi and Satake resistance and came into conflict with the Date. He was reknowned as a good and wise leader, doing much to improve the economic condition of the Ashina domain while expanding its borders. For this reason, Moriuji's reign is considered the Ashina's golden age. Moriuji built Mukaihaguroyama castle around 1561 as an intended place of retirement.
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005