The open prison concept in Japan is discussed in relation to the principle of containment concept in the western world's prison systems. War-time conditions in Japan and elsewhere are considered as contributing factors to the development of open prisons in conjunction with the role of pioneering individuals. Particular features of open programs are identified for programs at the Ohi Shipbuilding Dockyard Camp, Arii Dockyard Camp, Kagamihara Metal Industrial Camp, Kitsuregawa School for Agriculture and Civil Engineering, and the Ichihara Prison for Traffic Offenders. This analysis shows that the open prison concept is particularly consistent with the unique qualities of Japanese corrections and Japanese cultural values. The work programs are an extension of the prison industries which employ, through contracts with private entrepreneurs, about three quarters of all inmates. Success of the program is ensured by cultural values such as duty, respect for authority, and diligent labor. 2 notes and 17 references (Author abstract modified)