He served the Oda, Toyotomi, and Tokugawa clans, and became a daimyō in the early Edo period.

Masanari was the husband of Kasuga-no-Tsubone,[3] who bore him three sons: Masakatsu, Masasada, and Masatoshi.

[5] One of Masanari's grandsons, Inaba Masayasu (1640–1684), is primarily remembered as the enigmatic wakadoshiyori assassin of tairō Hotta Masatoshi.

[10] A cadet branch was descended from Inaba Masanari (+1628[clarification needed]), who fought in the armies of Nobunaga and then Hideyoshi.

[9] Masanari's heirs settled in Yodo Domain (115,000 koku) in Yamashiro Province from 1723 through 1868.