While the project of moving Denken to Atago-cho was proceeding, the residents launched a campaign against Denken; to prove that Denken was safe, Yukichi built a new house for his second son Sutejiro next to the site for Denken.
移転の際に住民から反対運動が起こったので、福澤は次男福澤捨次郎の新居を伝研の隣りに作って、伝研が危険でないことを示した。