The legal capacity of a person to act is governed by their national law.
人の行為能力は、その本国法によって定める。
Notwithstanding the provisions of the preceding paragraph, when a person who has performed a juridical act is subject to the limitation of their capacity to act under their national law but has full capacity to act under the law of the place where the act is done (lex loci actus), that person is deemed to have full capacity to act, only in cases where all the parties were present in a place governed by the same law at the time of the juridical act.
法律行為をした者がその本国法によれば行為能力の制限を受けた者となるときであっても行為地法によれば行為能力者となるべきときは、当該法律行為の当時そのすべての当事者が法を同じくする地に在った場合に限り、当該法律行為をした者は、前項の規定にかかわらず、行為能力者とみなす。
The preceding paragraph does not apply to a juridical act to be governed by the provisions of family law or inheritance law, or a juridical act relating to real property situated in a place governed by a different law from the law of the place where the act was done.
前項の規定は、親族法又は相続法の規定によるべき法律行為及び行為地と法を異にする地に在る不動産に関する法律行為については、適用しない。