Daisuke's father, Sakunoshin NANBA, who was a member of the House of Representatives and also a member of the Koshin club (parliamentary group), resigned immediately, and starved to death by refusing food after confining himself to his own house in Suo Village, Kumage County, Yamaguchi Prefecture (present-day, Hikari City, Yamaguchi Prefecture).
衆議院議員で庚申倶楽部だった大助の父難波作之進は即日議員辞職し、山口県熊毛郡(山口県)周防村（現・山口県光市）の自宅で閉門蟄居後、食事を取らず餓死した。