Katagiri Sadaoki (片桐貞起)
He was the second son of Sadanao MATSUDA (younger brother of the third lord of domain Sadafusa KATAGIRI). His mother was a daughter of Shigemasa MATSUDA. His legal wife was a daughter of Ueda Kageyu (investigator of the Records of Outgoing Officials about superior field). His children were Mitsunori KATAGIRI (his first son), Sadanari KATAGIRI (the second son) and a daughter (Katsuchika UESUGI's legal wife). His official rank was Jugoinoge (Junior Fifth Rank, Lower Grade), Iwami no kuni no kami (Provincial Governor of Iwami).
He was born in Yamashiro Province in 1669. His childhood name was Tsurumatsu. As the heir of Koizumi Domain Sadatsune KATAGIRI died at a young age in 1709, Sadaoki was adopted by the lord of the domain Sadafusa on July 19. Sadafusa died next year and Sadaoki succeeded Sadafusa. Sadaoki died in Koizumi on May 15, 1741 and his second son Sadanari succeeded. He was 73 years old. Burial place : Korin-an, Daitoku-ji Temple in Murasakino, Kita Ward, Kyoto City Kyoto Prefecture.