When Koyo made a trip to Sado in 1899, he visited Niigata to see his uncle Yokoo (his mother Yo's elder sister's husband) who was a bureaucrat at the Ministry of the Treasury and the superintendent of a tax office in Niigata at that time.
紅葉が明治32年（1899年）に佐渡に旅した際に新潟で立ち寄ったのが、大蔵官僚で当時新潟の税務署長をしていた横尾の伯父（母庸の姉婿）である。