[Answer]
International adoptions are subject to the laws of the
country where adoptive parents live. Additionally an adoptive child must meet legal
requirements specified by the law of the child’s country from the view point of
protecting him/her. For example, if the law of the child’s country of origin requires
approval of the child himself or a third party, or permission from public
organizations, you need to satisfy the requirements in order to legalize an
international adoption procedure. Your particular case is governed by the
Japanese law which is the law of your spouse country. The Article 798 of the
Civil Code in Japan provides that adopting a minor obliges permission from the
Family Court. However, the proviso of the same article says that a step-child
can be adopted independently, without court authorization. However, the
Philippine law requires court permission for adoption to safeguard an adoptive
child, so you need to obtain permission from a family court in Japan or the
Philippines.