引言在日本,从古至今,关于物上代位最有争论的分别是:(1)目的物;(2)物上代位的意义;(3)物上代位时扣押要件的位置。在1990年的日本泡沫经济崩溃时,拥有出租不动产为抵押财产的抵押权人没有实行他们的抵押权而是实行了向租金的物上代位,以保证他们的债权的安全回收,因此就和在租金债权上有利害关系的让渡担保权人等第三者发生了冲突。在此,笔者会介绍并分析关于向租金的物上代位时的以上(2)和(3)的讨论成果。一、物上代位的目的物(一)租金债权以外 INTRODUCTION In Japan, the most controversial points about the Substitutions of Substance in ancient times are: (1) the object; (2) the meaning of the Substitute; and (3) the position of the Substance Seizure in the Substitution. When the Japanese bubble economy of 1990 collapsed, the mortgagee, who owned the real property for rent as mortgaged property, did not exercise their mortgage rights but implemented the subrogation of the rent to ensure the safe recovery of their claims. Therefore, A third party, such as a grantor of a grantor who has an interest in rent claims, has clashed. Here, I will introduce and analyze the results of the discussions above (2) and (3) on the subrogation of rents. First, the subrogation of the object (a) rental claims other than