There was a village which was called Yunosawa, lots of leprosy patients lived, existed from 1887 to 1941, Kusatu town, Gunma Prefecture, Japan. It was the only place continued securing self-government to the last as area was free from the isolation policy of State in prewar days there. The aim of this study will make clear the dynamism of "The protection from the tension of the society of leprosy patient currently persecuted" to "The defense of the society from the leprosy patient who is a source of infection". In this study, explained the history of the Yunosawa village and the shift of the policy of leprosy by State had relation to the village. In addition, the effort of residents and Christianity persons' activity are drawn in this paper. Moreover also drew what is desired how it is going to live under adverse circumstances, and showed worth of free medical-treatment area here.