He yielded the family estate to his heir and son Katsutoshi MIZUNO and retired in 1639, but continued to invest his retirement stipend of 10,000 koku in Fukuyama-jo castle town.
寛永16年（1639年）に家督を嫡子水野勝俊に譲り隠居するが、隠居料の1万石をもって更なる福山城下町への投資を続けた。