The Act on Treatment of Sentenced Inmates was newly established by eliminating the parts mainly concerning treatment of sentenced inmates from the provisions of the old Prison Act and was put into force on May 24, 2006. In the meantime, pursuant to the Supplementary Provisions of the Act on Treatment of Sentenced Inmates, the parts concerning treatment of untried inmates among the old Prison Act were retitled as the Act on Accommodation of Criminal Defendants in Penal Institutions and it was determined that the provisions of the old Prison Act would continue to be applied.
  The Act for Partial Amendment to the Act on Treatment of Sentenced Inmates (Act No. 58 of 2006), which was promulgated on June 8, 2006, contains the following as the major contents: (1) matters concerning management of detention institutions shall be specified, in addition to matters concerning establishment of detention institutions, types of persons detained, and alternative accommodation to detention institutions; and (2) the scope of rights and obligation of untried inmates shall be clarified, and when it is necessary to impose restrictions on their life and acts, the grounds and limits thereof shall be specified. It was also determined that the title of the Act on Treatment of Sentenced Inmates should be changed to the Act on Penal Institutions and Treatment of Inmates, etc. and that the Act on Accommodation of Criminal Defendants in Penal Institutions should be abolished. The new Act should be put into force on a day specified by a Cabinet Order within one year from the day of promulgation.