Shirakawa Domain
was the 5th Abe "daimyō" of Shirakawa Domain. He was the eldest son of Abe Shōzō, a 3000 "koku" "hatamoto" retainer of Shirakawa Domain, and was adopted as heir to Abe Masakata. However, he died only three months after taking office. As he had no heir, his death was kept secret from the authorities until Abe Masahisa could be summoned from Fukuyama Domain and proclaimed heir. Masasada's death was announced on the same day. Masasada's grave is at the temple of Saifuku-ji in Kurumae, Tokyo.