The international comparative study about a foreigner's entry into and departure from the country and a residents system, and its employment

在移民管制领域，主管行政机构拥有广泛的自由裁量权。但是，正如这项研究显示的那样，不断发展的国内法律制度和人权条约现在正在创造限制每个国家自由裁量权范围的国际标准。因此，应修改国内法律制度，使之与这些国际标准保持一致。关于日本的法律制度，例如，应修改禁止驱逐的理由，以便将这些标准纳入法规，或者用这些标准来控制行政机关的自由裁量权。此外，应改变移民拘留制度，以保障外国人的各种人权。

In the field of immigration control, broad discretion has been admitted to the competent administrative agency. But, as this study shows, the evolving domestic legal system and human rights treaties are now creating international standards which restrict the scope of the discretion of each country. Therefore, domestic legal system should be modified so as to be consistent with these international standards. With regard to the Japanese legal system, for example, grounds for prohibition of expulsion should be modified to include these standards in the statute or these standards should be used to control the discretion of the administrative agency. In addition, the immigration detention system should be altered to guarantee various human rights of aliens.