Released from prision, KONO took part in the Daido danketsu (Grand Coalition) Movement which rallied the democratic rights movement by Shojiro GOTO, and participated in the planning of Daido club.
牢から出た河野は、後藤象二郎の自由民権派を糾合する大同団結運動に参加し、大同倶楽部結成に参画する。