In 1890, Yonosuke who had resigned the post of Guncho ran in the first general election of the members of the House of Representatives from the then third constituency (Katori County, etc.) of Chiba Prefecture, and elected as a member of the House of Representatives for the first time.
明治23年（1890年）、郡長を辞した庸之助は第1回衆議院議員総選挙に当時の千葉県第3区（香取郡など）から出馬して衆議院議員に初当選した。