In 1871, again, the Four Domains simultaneously took the role of national leadership in reporting a plan of the Haihan-chiken (abolition of feudal domains and establishment of prefectures) to the emperor, and led the abolition of the various domains of the entire nation.
1871年（明治4年）、再び4藩同時に率先して廃藩置県を上奏し、全国諸藩の廃藩置県を導いた。