Chikanaga SEKIGUCHI, who was the father of Tsukiyama-dono who became a lawful wife of Ieyasu TOKUGAWA, was a branch of the Sena clan traced back to the Totomi-Imagawa clan.
なお、徳川家康の正室であった築山殿の父関口親永は、遠江今川家の流れである瀬名氏の支流である。