On November 5, 1748, the third lord Masanobu HOTTA was promoted to wakadoshiyori (a managerial position in the Edo bakufu [Japanese feudal government headed by a shogun]) together with an increase of 3,000 koku, with which the Miyagawa Domain's territory was expanded to a total of 13,000 koku.
第3代藩主・堀田正陳は若年寄となって寛延元年（1748年）10月15日に3,000石の加増を受け、宮川藩は1万3,000石を領することになった。