The Nagoya clan was a family of the Imagawa clan who were invested with Owari Province as the local governor when Nakaaki IMAGAWA became the military governor of Owari from 1390 to 1427, and it is believed that Ujitoyo was adopted by them.
那古野氏は明徳-応永年間に今川仲秋が尾張守護となったときに尾張国に代官として封じられた今川氏の一族で、氏豊はその養子となったとされている。