Partnership oath in Japan

As of 29 March 2025, 423 municipalities and 31 of 47 prefectures in Japan have established a "partnership oath system" (Japanese: パートナーシップ宣誓制度, pātonāshippu sensei seido, pronounced [paːtonaːɕippɯ senseː seːdo]), also known as "partnership certification system" (パートナーシップ証明制度, pātonāshippu shōmei seido), which provides same-sex (and, in some jurisdictions, common-law opposite-sex) couples with some limited benefits.

The couple is issued a special certificate which may be useful in matters such as housing, hospital visitation rights and consenting to surgery for a partner. However, the system is not legally binding and there is no legal obligation on landlords or hospitals to honour the couples' rights even if presented with a certificate, though cities have encouraged companies, hospitals and landlords to recognize the certificate. The various benefits provided by the system are also very limited in comparison to those granted to married couples; same-sex couples cannot inherit the estate and property of a deceased partner or attend the funeral of a deceased partner for instance. Partners must meet certain requirements, including living in the municipality or prefecture, being older than 20 years of age, and not having a spouse or another partner. In some jurisdictions, the children and other close relatives of a partnered couple may opt to be recognized in the partnership oath.