In Japan, the will is limited in what it can do. The post-mortem affairs entrustment contract is what supplements what the will cannot do.
The will and the post-mortem affairs entrustment contract are both important documents that relate to your death, but they have different roles. By writing down your wishes for the inheritance of your property and the post-mortem affairs such as funerals in your will, you can convey your wishes to your heirs and relatives. However, the will also includes non-binding annotations, and it is not always possible to carry out the post-mortem affairs as specified in the will.
On the other hand, the post-mortem affairs entrustment contract is a contract, so the appointed person is legally obligated to fulfill the delegated tasks. Therefore, by specifying your wishes for the post-mortem affairs in your will and entrusting them as specific procedures in the post-mortem affairs entrustment contract, you can more reliably realize your wishes.
In this way, the post-mortem affairs entrustment contract comes into play from where the will ends.
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