Partnership oath in Japan

Main article: Recognition of same-sex unions in Japan

Map of Japanese subdivisions that issue partnership certificates to same-sex couples.

  Issues partnership certificates to same-sex couples

As of 1 April 2024, 417 municipalities and 26 prefectures 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, 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.

Municipal partnership systems

On April 1, 2015, Shibuya in central Tokyo announced it would offer same-sex couples special "partnership certificates". While these licenses are not legally recognized as marriage certificates, they may be used in civil matters such as hospital visitation rights and housing. The Shibuya city office began accepting applications on 28 October 2015. In response to this action by the Shibuya city office, the "Special Committee to Protect Family Ties" (家族の絆を守る特命委員会, kazoku no kizuna wo mamoru tokumei iinkai) of the federal ruling Liberal Democratic Party was formed in March 2015 to discuss the matter. An officer from the Ministry of Justice who was invited to comment stated that the action by Shibuya is legal because the certificate issued is not a marriage certificate and the current Japanese legal code does not prohibit the "partnership" of same-sex couples. In July 2015, Setagaya announced it would be joining Shibuya in issuing partnership certificates from 5 November. In November 2015, the special city of Takarazuka announced it would issue partnership certificates to same-sex couples beginning on 1 June 2016. In December 2015, the city of Iga in Mie Prefecture made a similar announcement, with certificates starting on 1 April 2016, and on 22 February 2016, Naha, the capital of Okinawa Prefecture, announced it would begin issuing partnership certificates to same-sex couples on 8 July 2016.

In April 2016, an LGBT rights group began a campaign for the official recognition of same-sex couples in Sapporo, the capital of Hokkaido Prefecture. The group took its petition to the Sapporo City Government in June 2016. In December 2016, officials announced that Sapporo planned to draw up guidelines by March 2017. In March, the City Government announced that partnership certificates would be issued to couples beginning on 1 June 2017. While the certificates hold no legal meaning, some insurance companies use them to allow same-sex partners to be added as beneficiaries. According to the city, about 1,500 people expressed opinions welcoming the program, while some opposed it. Sapporo became the first designated city in Japan to establish a partnership system. On 14 February 2018, the Fukuoka city office announced plans to start issuing partnership certificates to same-sex and different-sex couples from 2 April 2018. Osaka followed suit on 9 July 2018, and Chiba on 29 January 2019. Nakano began offering partnership certificates on 20 August 2018. Couples can receive notarized documentation recognizing a delegation agreement for medical treatment and nursing care, property management and other areas in which married couples share responsibility.

The number of cities which have established a partnership registry has steadily increased in the years since. 21 cities established a same-sex partnership system in 2019, notably Kitakyushu, Kumamoto, Miyazaki, Nagasaki, Sakai, Yokohama, and Yokosuka. 36 more cities followed suit in 2020, including Hamamatsu, Kawasaki, Kyoto, Minato, Nara, Niigata, Okayama, Sagamihara, Saitama, and Takamatsu. 69 more cities followed in 2021, notably Adachi, Chigasaki, Fujisawa, Funabashi, Hiroshima, Kanazawa, Kōchi, Koshigaya, Nishinomiya, and Toyota. 107 cities established a partnership system in 2022, including Akita, Kagoshima, Nagano, Nagoya, and Shizuoka, and 106 cities in 2023, including Kobe, Kashiwa, Morioka, Ōita, Matsudo, Ichikawa, Machida and Fujisawa. On 1 April 2023, Kagawa became the first prefecture in which all municipalities had created their own registries, despite lacking a prefecture-wide registry; Kanagawa became the second by 1 July 2023.

Prefectural partnership systems

Map of Japan showing which prefectures have legalized same-sex partnership registries.

  Purple prefectures have active familyship registries with recognition of children and in-laws.

  Magenta prefectures have active partnership registries.

  Blue prefectures have passed legislation to create registries, but they are not yet in effect.

  Light green prefectures do not have a prefecture-wide system, but all municipalities within have registries.

  Yellow prefectures recognize their own municipalities' partnership registries without having a prefecture-level registry.

  Gray prefectures do not have any prefecture-level registries nor recognition.

In January 2019, the Government of Ibaraki Prefecture announced it was considering introducing a partnership system for same-sex couples in April 2019. In March 2019, Governor Kazuhiko Ōigawa expressed his personal support for the introduction of such a scheme. The Ibaraki Prefectural Assembly began examing legislation to this effect in June 2019. The prefecture has offered partnership certificates since July 1, 2019, which made it the first prefecture to do so. Eight days later, Mito, the prefectural capital, announced that couples who are in the possession of the prefecture's certificates would be eligible to move into the municipality's public housing facilities, starting in August 2019.

On 15 January 2020, Osaka Prefecture announced it would start a partnership system on January 22. Governor Hirofumi Yoshimura said in a statement that "we should aim for a society where one can live as themselves". The first couple to receive a certificate were Shuji Yamada and Shigeo Hiruda on 31 January. The certificate allows couples to apply to move into prefectural housing and consent to surgery, among other limited benefits. Five cities in Osaka had already established such a system before it was extended to the entire prefecture. Gunma Prefecture announced on 5 November 2020 that it would introduce a partnership system by the end of the year. The system would provide same-sex couples with some limited recognition, including the right to move into prefectural housing and visit each other in hospitals. Governor Ichita Yamamoto said he hoped the move would "send a positive message" and "promote diversity". On 17 December, Yamamoto announced the system would be established on 21 December. The first certificate was issued to couple Saori Tanaka and Hisanagi Makita in Shibukawa on 24 December.

On 20 November 2020, Governor Eikei Suzuki of Mie Prefecture announced his intention to introduce a partnership system before the end of the year. The system was introduced on 1 September 2021, with the first couple issued a certificate that same day in Tsu. Saga Prefecture started its partnership oath system a few days earlier, on 27 August 2021. Governor Yoshinori Yamaguchi praised the move. In November 2021, the government of Aomori Prefecture announced its intention to introduce a partnership system on 7 February 2022. A partnership oath system has also been in effect in Akita and Fukuoka prefectures since 1 April 2022. On 15 February 2022, Governor Tomikazu Fukuda of Tochigi Prefecture announced he would introduce a partnership system in fall 2022; it was established on 1 September 2022.

On 7 June 2021, the General Affairs Committee of the Tokyo Metropolitan Assembly unanimously accepted a petition, launched by LGBT activists and signed by 18,000 people, to establish a partnership system in Tokyo Metropolis. Governor Yuriko Koike expressed her support for the move, stating it would "respect the human rights of sexual minorities and promote the understanding of Tokyo citizens regarding diversity". The bill was enacted by the Metropolitan Assembly on 15 June 2022. It calls on businesses and other entities to treat same-sex partnerships as equal to married couples, allowing couples to access family-use housing and the right to visit their partners in hospital. At least one partner must be resident in Tokyo or a commuter for work. It came into force on 1 November, with applications being accepted from 10 October, making Tokyo the tenth prefecture to do so.

Governor Hajime Furuta of Gifu Prefecture announced on 10 December 2020 that he was considering establishing a partnership system in the prefecture. Governor Heita Kawakatsu of Shizuoka Prefecture announced on 1 September 2021 that he was also considering it by the end of 2022. The Deputy Governor of Toyama Prefecture voiced the same in December 2021. Both Shizuoka and Toyama prefectures established a partnership system on 1 March 2023.

Overall, the number of prefectures which have established a partnership registry has slowly increased over the years. 1 was established in 2019 (Ibaraki), 2 in 2020 (Osaka, Gunma), 2 in 2021 (Saga, Mie), 5 in 2022 (Aomori, Akita, Fukuoka, Tochigi, Tokyo), 9 in 2023 (Shizuoka, Toyama, Nagano, Gifu, Kagawa, Shimane, Tottori, Fukui, Yamanashi), and 7 in 2024 so far (Yamagata, Wakayama, Aichi, Hyogo, Nara, Oita, Tokushima). The establishment of prefectural systems has often not precluded the subsequent establishments of municipal systems within the same prefecture.

Mutual recognition of certificates

Between cities

On October 30, 2019, the cities of Fukuoka and Kumamoto announced they would recognize each other's partnership certificates effective immediately. This marked the first time that two or more jurisdictions in Japan had begun recognizing each other's certificates, easing recognition for same-sex couples. This means that if a same-sex couple with a certificate moves between both cities they need not reapply for a certificate in their new city. Since 1 April 2020, certificates from Kitakyushu and Koga are also recognized between the four cities. Certificates from Okayama, Nichinan, and Karatsu are also recognised in Fukuoka.

On December 2, 2019, the mayor of Yokosuka announced his intention to establish a joint recognition scheme with the fellow Kanagawa cities of Zushi and Kamakura, taking effect on 1 April 2020. Hayama joined the scheme on 1 July 2020, and Miura joined on 1 January 2021. In July 2020, Okayama and Sōja agreed to mutually recognize their certificates and eliminate the need for new procedures when couples move between the two cities. Okayama reached a similar agreement with Fukuoka in November 2020 and Hiroshima in January 2021. Hiroshima and Akitakata also mutually recognize their certificates. The cities of Katano and Hirakata decided to recognize each other's certificates in June 2021. Since then, numerous other cities have also established such mutual recognition schemes. On 1 February 2022, a similar agreement took effect between Chigasaki, Fujisawa and Samukawa.

The cities of Chiba and Yokohama made a similar recognition agreement in January 2021, effective on 1 February 2021. In early April 2021, the cities and towns of Amagasaki, Ashiya, Inagawa, Itami, Kawanishi, Nishinomiya, Sanda and Takarazuka, all in Hyōgo Prefecture, agreed to recognize each other's certificates. Likewise, in May 2021, 12 municipalities in Tokyo, Adachi, Bunkyō, Edogawa, Fuchū, Koganei, Kokubunji, Kunitachi, Minato, Nakano, Setagaya, Shibuya and Toshima, agreed to mutually recognize each other's certificates. The cities of Chiba, Funabashi, Ichikawa, Matsudo, Kashiwa, and Narashino, all in Chiba prefecture, signed a mutual recognition agreement on July 11, 2023.

Eighteen cities in Aichi Prefecture signed an agreement to recognize each other's partnership certificates on October 17, 2023. On October 29, 2023, the Kanagawa Prefecture cities of Fujisawa, Yokohama and Isehara signed an agreement.

Between prefectures

On 18 August 2022, Saga and Ibaraki prefectures announced they would recognize each other's partnership certificates, becoming the first prefectures to do so. Saga Prefecture completed a similar agreement with Fukuoka on 24 November. On 20 December, mutual recognition was established between Ibaraki, Tochigi and Gunma prefectures. On 31 January 2023, Ibaraki signed an agreement with Mie. On September 4, 2023, Ibaraki signed an agreement with Toyama. On February 22, 2024, an agreement was signed between Mie and Gifu prefectures.

Between prefectures and internal municipalities

In March 2020, Iwate Prefecture passed a law to recognize partnership registries created by municipalities within the prefecture for purpose of benefits, despite not having a prefecture-level registry at the time.

Upon establishing its own partnership registry in November 2022, Tokyo Metropolis mutually recognized all partnership registries in Tokyo's wards and cities.

Between prefectures and external municipalities

On October 30, 2023, Ibaraki Prefecture and the city of Saitama, Saitama Prefecture signed an agreement to recognize each other's partnership registries.

List of partnership oath systems

As of 1 March 2024, the following 380 municipalities and 26 prefectures have established a same-sex partnership oath system, comprising about 84% of the Japanese population. In 16 further jurisdictions, such policies will soon take effect. Partnership registries have not yet been established at the municipal nor prefecture levels of Miyagi prefecture. Prefectures are bolded. An asterisk (*) indicates that familyship registration is also available.

2015	28 October	Shibuya, Tokyo
	5 November	Setagaya, Tokyo*
2016	1 April	Iga, Mie
	1 June	Takarazuka, Hyōgo
	8 July	Naha, Okinawa*
2017	1 June	Sapporo, Hokkaido*
2018	2 April	Fukuoka, Fukuoka
	9 July	Osaka, Osaka*
	20 August	Nakano, Tokyo
2019	1 January	Ōizumi, Gunma
	29 January	Chiba, Chiba*
	1 April	Edogawa, Tokyo Fuchū, Tokyo Hirakata, Osaka Kumamoto, Kumamoto Odawara, Kanagawa Sakai, Osaka Sōja, Okayama* Toshima, Tokyo Yokosuka, Kanagawa
	3 June	Kanuma, Tochigi*
	10 June	Miyazaki, Miyazaki
	1 July	Ibaraki Kitakyushu, Fukuoka
	1 September	Nishio, Aichi
	2 September	Nagasaki, Nagasaki
	11 October	Sanda, Hyōgo*
	22 November	Katano, Osaka
	2 December	Yokohama, Kanagawa
	4 December	Daitō, Osaka Kamakura, Kanagawa
2020	1 January	Mitoyo, Kagawa*
	6 January	Amagasaki, Hyōgo
	22 January	Osaka
	1 April	Bunkyō, Tokyo Hamamatsu, Shizuoka Kijō, Miyazaki Koga, Fukuoka* Minato, Tokyo Nara, Nara Niigata, Niigata Sagamihara, Kanagawa Saitama, Saitama Takamatsu, Kagawa* Tokushima, Tokushima* Yamatokōriyama, Nara Zushi, Kanagawa
	1 May	Kawagoe, Saitama Toyoake, Aichi
	15 May	Itami, Hyōgo
	17 May	Ashiya, Hyōgo
	1 July	Hayama, Kanagawa Inabe, Mie Kawasaki, Kanagawa Okayama, Okayama Tondabayashi, Osaka*
	1 August	Kawanishi, Hyōgo
	1 September	Kaizuka, Osaka Kyoto, Kyoto
	1 October	Sakado, Saitama
	20 October	Koganei, Tokyo
	1 November	Kitamoto, Saitama Matsudo, Chiba* Tochigi, Tochigi
	15 November	Kokubunji, Tokyo
	1 December	Kōnosu, Saitama*
	10 December	Hirosaki, Aomori
	21 December	Gunma Shibukawa, Gunma
2021	1 January	Higashikagawa, Kagawa Miura, Kanagawa Yoshinogawa, Tokushima
	4 January	Hiroshima, Hiroshima
	8 January	Akashi, Hyōgo*
	1 February	Kōchi, Kōchi Okegawa, Saitama
	1 March	Kameoka, Kyoto Ina, Saitama
	16 March	Ageo, Saitama
	1 April	Adachi, Tokyo* Annaka, Gunma Chigasaki, Kanagawa Fuji, Shizuoka Fujisawa, Kanagawa Gyōda, Saitama Honjō, Saitama Ibusuki, Kagoshima Ikoma, Nara Inagawa, Hyōgo Kitajima, Tokushima Koshigaya, Saitama Kunitachi, Tokyo Matsumoto, Nagano Miyoshi, Saitama* Nichinan, Miyazaki Nishinomiya, Hyōgo Shōdoshima, Kagawa Tadotsu, Kagawa Tenri, Nara Tonoshō, Kagawa Toyohashi, Aichi Usuki, Ōita Yamato, Kanagawa
	26 April	Nobeoka, Miyazaki
	1 May	Urayasu, Chiba
	1 June	Chiyoda, Gunma Nagaokakyō, Kyoto
	1 July	Higashimatsuyama, Saitama Kanazawa, Ishikawa Minamiashigara, Kanagawa Ōi, Kanagawa
	16 July	Toyota, Aichi*
	27 August	Saga
	1 September	Mie Miyoshi, Tokushima Iruma, Saitama* Nikkō, Tochigi Shintomi, Miyazaki Ube, Yamaguchi
	1 October	Akitakata, Hiroshima Bizen, Okayama Hikone, Shiga Karatsu, Saga Kawajima, Saitama* Kuki, Saitama Matsuda, Kanagawa Moroyama, Saitama Ōzu, Kumamoto Urasoe, Okinawa
	3 October	Mukō, Kyoto
	11 October	Sayama, Saitama
	1 November	Naka, Tokushima
	1 December	Ebino, Miyazaki Kōshū, Yamanashi Kurashiki, Okayama Maniwa, Okayama Tokigawa, Saitama Zentsūji, Kagawa
	10 December	Hakusan, Ishikawa
	16 December	Funabashi, Chiba
	20 December	Sōka, Saitama
2022	1 January	Hannō, Saitama* Hidaka, Saitama* Kagoshima, Kagoshima Mihara, Hiroshima Tokorozawa, Saitama*
	4 January	Gamagōri, Aichi
	1 February	Ayase, Kanagawa Ichikawa, Chiba* Samukawa, Kanagawa Tama, Tokyo Yoshikawa, Saitama
	7 February	Aomori
	1 March	Ebetsu, Hokkaido Kamimine, Saga Mima, Tokushima
	23 March	Fukaya, Saitama
	1 April	Akita Fukuoka Aikawa, Kanagawa Akita, Akita Anan, Tokushima* Atsugi, Kanagawa Ayagawa, Kagawa Bungo-Ōno, Ōita* Ebina, Kanagawa Fuchū-cho, Hiroshima Fujimi, Saitama Fukuchiyama, Kyoto Fukutsu, Fukuoka Hakodate, Hokkaido Hatoyama, Saitama Hatsukaichi, Hiroshima Himeji, Hyōgo Hiratsuka, Kanagawa Kadogawa, Miyazaki Kaisei, Kanagawa Kamikawa, Saitama Kamisato, Saitama Kan'onji, Kagawa* Kasaoka, Okayama* Kasuya, Fukuoka* Kita, Tokyo Kitami, Hokkaido Komagane, Nagano Kosai, Shizuoka* Kotohira, Kagawa Kumagaya, Saitama Mannō, Kagawa Misato, Saitama Miyashiro, Saitama* Musashino, Tokyo Nakai, Kanagawa Ninomiya, Kanagawa Nogi, Tochigi Ōiso, Kanagawa Okazaki, Aichi* Saito, Miyazaki Sanuki, Kagawa Seki, Gifu Shinshiro, Aichi Shizuoka, Shizuoka Tahara, Aichi Takahama, Aichi Taketa, Ōita Tatsuno, Hyōgo Utazu, Kagawa Yamakita, Kanagawa Yashio, Saitama Yokoze, Saitama Yoshimi, Saitama* Yoshioka, Gunma
	25 April	Arakawa, Tokyo
	1 May	Kasugai, Aichi
	1 June	Hyūga, Miyazaki Narashino, Chiba Naruto, Tokushima Sakaide, Kagawa Tosashimizu, Kōchi*
	1 July	Fujimino, Saitama Ibaraki, Osaka Kiyokawa, Kanagawa Sakaiminato, Tottori Toyokawa, Aichi
	30 July	Kikuchi, Kumamoto
	1 September	Tochigi Ichinomiya, Aichi* Miki, Kagawa Misato, Saitama Sanjō, Niigata Sano, Tochigi Toyoyama, Aichi*
	1 October	Awa, Tokushima Echizen, Fukui Hashimoto, Wakayama* Kaita, Hiroshima Kuroshio, Kōchi Mimasaka, Okayama Miyoshi, Aichi Nasushiobara, Tochigi Ōtawara, Tochigi Setouchi, Okayama Zama, Kanagawa
	11 October	Toda, Saitama*
	1 November	Tokyo* Ikeda, Osaka* Nankoku, Kōchi
	1 December	Asakuchi, Okayama Nagano, Nagano Nagoya, Aichi* Obihiro, Hokkaido
	4 December	Nonoichi, Ishikawa
	23 December	Ichinoseki, Iwate*
2023	1 January	Hita, Ōita Marugame, Kagawa Ogano, Saitama Shiraoka, Saitama
	4 January	Tomakomai, Hokkaido
	5 January	Miyoshi, Hiroshima
	10 January	Wakō, Saitama*
	1 February	Iwamizawa, Hokkaido Komaki, Aichi* Nagaoka, Niigata*
	1 March	Shizuoka Toyama Kikuyō, Kumamoto Kōnan, Kōchi Nisshin, Aichi Ranzan, Saitama*
	15 March	Chōfu, Tokyo Kashiwa, Chiba*
	23 March	Kazo, Saitama
	1 April	Asaka, Saitama* Aso, Kumamoto Ayabe, Kyoto Bungotakada, Ōita Chiryū, Aichi Gojō, Nara Hakone, Kanagawa Handa, Aichi Hasuda, Saitama Higashihiroshima, Hiroshima Hino, Tokyo Hokuto, Hokkaido Ibara, Okayama Ikaruga, Nara Imabari, Ehime Kaizu, Gifu* Kanda, Fukuoka Kasukabe, Saitama* Katsuyama, Fukui Kisarazu, Chiba Kobayashi, Miyazaki Kōshi, Kumamoto Machida, Tokyo Maibara, Shiga* Matsubushi, Saitama Meiwa, Mie Nachikatsuura, Wakayama* Namegawa, Saitama* Naoshima, Kagawa Nasukarasuyama, Tochigi Niiza, Saitama* Nōgata, Fukuoka Ogawa, Saitama Ōmura, Nagasaki Oyama, Tochigi Ōzu, Ehime Sabae, Fukui Sakata, Yamagata Satte, Saitama Shiki, Saitama* Sugito, Saitama Suita, Osaka Sumida, Tokyo Takasago, Hyōgo* Tamba, Hyōgo Tamba-Sasayama, Hyōgo Tōkai, Aichi Tsurugashima, Saitama Wake, Okayama Yugawara, Kanagawa
	24 April	Suginami, Tokyo
	1 May	Matsubara, Osaka Morioka, Iwate*
	15 May	Tagawa, Fukuoka
	1 June	Aki, Kōchi Awara, Fukui Higashichichibu, Saitama Nagakute, Aichi Ōyamazaki, Kyoto
	1 July	Hadano, Kanagawa Isehara, Kanagawa Kakogawa, Hyōgo Kariya, Aichi Kawara, Fukuoka Kōta, Aichi Manazuru, Kanagawa Ōbu, Aichi Ōmihachiman, Shiga Warabi, Saitama
	1 August	Nagano Seto, Aichi Suzaka, Nagano
	1 September	Gifu Ōita, Ōita
	28 September	Miyako, Iwate*
	1 October	Kagawa Shimane Tottori* Chita, Aichi Fuchū, Hiroshima Hioki, Kagoshima Kurayoshi, Tottori* Shingū, Wakayama* Tsubata, Ishikawa Yahaba, Iwate
	10 October	Nirasaki, Yamanashi*
	1 November	Fukui Yamanashi Itabashi, Tokyo Minano, Saitama Obama, Fukui Sakai, Fukui Tsuruga, Fukui Yorii, Saitama*
	27 November	Eiheiji, Fukui
	1 December	Hayashima, Okayama* Kai, Yamanashi
	10 December	Kahoku, Ishikawa
	25 December	Kobe, Hyōgo
2024	1 January	Awaji, Hyōgo Daisen, Tottori* Fukui, Fukui Izumisano, Osaka* Misasa, Tottori Otaru, Hokkaido Ōtsuki, Kōchi Shibushi, Kagoshima Soeda, Fukuoka Tamamura, Gunma Takikawa, Hokkaido Yazu, Tottori*
	4 January	Yamagata Date, Fukushima Ichihara, Chiba
	16 January	Aibetsu, Hokkaido Asahikawa, Hokkaido Biei, Hokkaido Higashikagura, Hokkaido Higashikawa, Hokkaido Pippu, Hokkaido Takasu, Hokkaido Tōma, Hokkaido
	1 February	Wakayama Chichibu, Saitama* Izumi, Kagoshima Jōetsu, Niigata* Kōnan, Aichi* Nagareyama, Chiba*
	1 March	Fukagawa, Hokkaido Hanyū, Saitama* Murakami, Niigata* Owariasahi, Aichi*
	29 March	Ogose, Saitama*
	1 April	Aichi* Hyōgo Nara Ōita Tokushima Abashiri, Hokkaido Abu, Yamaguchi Akaiwa, Okayama* Anjō, Aichi* Fusō, Aichi* Heguri, Nara Higashiura, Aichi* Himeshima, Ōita Hiraizumi, Iwate* Ino, Kōchi Inuyama, Aichi* Kamikawa, Hokkaido Kasai, Hyōgo* Katagami, Akita Kawanishi, Nara Kimitsu, Chiba* Kitahiroshima, Hiroshima Kitakami, Iwate Kiyosato, Hokkaido Kiyosu, Aichi* Komatsushima, Tokushima Koshimizu, Hokkaido Kuji, Iwate* Kusatsu, Shiga Kushimoto, Wakayama* Kushiro, Hokkaido Miki, Hyōgo Minamiawaji, Hyōgo Mitaka, Tokyo Muroran, Hokkaido Nagahama, Shiga Nagatoro, Saitama Nantan, Kyoto Ōfunato, Iwate* Ōguchi, Aichi* Ōno, Fukui Ōzora, Hokkaido Rikuzentakata, Iwate* Saiki, Ōita Shari, Hokkaido Shisō, Hyōgo* Shiwa, Iwate* Shōbara, Hiroshima Sodegaura, Chiba* Takachiho, Miyazaki Taketoyo, Aichi* Uchiko, Ehime* Usa, Ōita Yamaguchi, Yamaguchi Yufu, Ōita

Future partnership systems

2024	13 May	Minamisōma, Fukushima*
	June	Kōka, Shiga
	September	Yamaguchi
	TBD	Niigata Shiga Fukushima, Fukushima Harima, Hyōgo Kitahiroshima, Hokkaido Kurihara, Miyagi Makubetsu, Hokkaido Sendai, Miyagi Sumoto, Hyōgo Tomioka, Fukushima
TBD		Hida, Gifu (supposed to have been introduced in 2019)

Measures to allow partnership certificates have been proposed in numerous areas, including the prefectures of Ishikawa and Iwate; several administrative wards in Tokyo, such as Chiyoda, Chūō, Katsushika, Kōtō, Nerima, Shinjuku, and Taitō; and the cities of Tōgō, Hachinohe, Matsuyama, Fukuyama, Kumano, Onomichi, Saka, Sera, Azumino, Nagayo, Kamo, Sado, Tamano, Itoman, Okinawa, Nago, Nanjō, Tomigusuku, Fujieda, Shimada, Higashimurayama, Nichinan, Yonago, Toyama, Hagi, Hirao, Iwakuni and Shimonoseki.

Family registration

Main article: LGBT rights in Japan § Adoption and family planning

Numerous other municipalities have also established a "partnership familyship system" (パートナーシップ・ファミリーシップ制度, pātonāshippu famirīshippu seido). This system also recognises the children and in-laws of same-sex couples, and allows partners to make medical decisions for their child, and to pick up their children at schools and kindergartens (whereas previously only the biological parent was allowed to pick up the child). The first to establish this system was Akashi, Hyōgo in January 2021 followed by Tokushima in February 2021 and Adachi, Tokyo in April 2021. Tokyo established a partnership system with a similar option in November 2022, becoming the first prefectural government to do so.

List of familyship registries

2021	January	Akashi, Hyōgo
	February	Tokushima, Tokushima
	April	Adachi, Tokyo
	July	Koga, Fukuoka, Toyota, Aichi
	September	Iruma, Saitama, Miyoshi, Tokushima
	October	Kawajima, Saitama
	December	Kōnosu, Saitama, Sōja, Okayama
2022	January	Hannō, Saitama, Hidaka, Tokorozawa, Mitoyo, Kagawa
	February	Ichikawa, Chiba
	April	Anan, Tokushima, Bungo-Ōno, Kan'onji, Kagawa, Kanuma, Tochigi, Kasaoka, Okayama, Kasuya, Fukuoka, Kosai, Shizuoka, Miyashiro, Saitama, Okazaki, Aichi, Yoshimi, Saitama
	June	Tosashimizu, Kōchi
	July	Tondabayashi, Osaka
	August	Osaka, Osaka
	September	Ichinomiya, Aichi, Toyoyama, Aichi
	October	Naha, Okinawa, Toda, Saitama, Ikeda, Osaka
	November	Tokyo Prefecture
	December	Setagaya, Tokyo, Nagoya, Aichi, Ichinoseki, Iwate
2023	January	Wako, Saitama
	February	Komaki, Aichi, Nagaoka, Niigata
	March	Ranzan, Saitama, Kashiwa, Chiba
	April	Asaka, Saitama, Ashiya, Hyogo, Chiba, Chiba, Kaizu, Gifu, Kasukabe, Saitama, Kōshi, Kumamoto, Maibara, Shiga, Matsudo, Chiba,Nachikatsuura, Wakayama, Namegawa, Saitama, Niiza, Saitama, Sapporo, Shiki, Saitama, Takasago, Hyōgo
	May	Morioka, Iwate
	August	Sanda, Hyōgo
	September	Miyako, Iwate, Takamatsu, Kagawa
	October	Tottori Prefecture, Hashimoto, Wakayama, Kurayoshi, Tottori, Nirasaki, Yamanashi, Shingū, Wakayama
	November	Yorii, Saitama
	December	Hayashima, Okayama
2024	January	Daisen, Tottori, Izumisano, Osaka, Misasa, Tottori, Niigata, Niigata, Takarazuka, Hyogo, Yazu, Tottori
	February	Chichibu, Saitama, Jōetsu, Niigata, Kōnan, Aichi, Nagareyama, Chiba
	March	Hanyū, Saitama, Murakami, Niigata, Ogose, Saitama, Owariasahi, Aichi
	April	Aichi Prefecture, Akaiwa, Okayama, Anjō, Aichi, Fusō, Aichi, Higashiura, Aichi, Hiraizumi, Iwate, Inuyama, Aichi, Kasai, Hyōgo, Kawagoe, Saitama, Kimitsu, Chiba, Kiyosu, Aichi, Kuji, Iwate, Kushimoto, Wakayama, Ōfunato, Iwate, Ōguchi, Aichi, Rikuzentakata, Iwate, Shisō, Hyōgo, Shiwa, Iwate, Sodegaura, Chiba, Tahara, Aichi, Taketoyo, Aichi, Tenri, Nara, Tōkai, Aichi, Toyohashi, Aichi, Uchiko, Ehime, Zentsūji, Kagawa
	May	Minamisōma, Fukushima

List of mutual recognition agreements

The following is a list of agreements of mutual recognition of partnership oath registries between jurisdictions (Japanese: パートナーシップ制度の相互利用連携, pātonāshippu seido no sōgo riyō renkei).

2019	October 30	Fukuoka and Kumamoto
	December 2	Yokosuka, Zushi and Kamakura (Kanagawa)
2020	January 1	Mihara and Hiroshima (Hiroshima)
	March	Iwate Prefecture with all internal municipalities
	March 1	Yokohama and Sagamihara (Kanagawa)
	April 1	Fuchū (town) and Hiroshima (Hiroshima); Hatsukaichi and Hiroshima (Hiroshima)
	July	Okayama and Sōja (Okayama)
	July 1	Yokosuka, Zushi, Kamakura and Hayama (Kanagawa)
	November	Okayama, Okayama and Fukuoka, Fukuoka
	October 1	Fuchū (city) and Hiroshima (Hiroshima); Hiroshima and Kaita (Hiroshima)
	November 1	Yokohama and Isehara (Kanagawa), Yokohama and Fujisawa (Kanagawa),
	December 1	Yokohama and Yokosuka (Kanagawa)
2021	January	Okayama, Okayama and Hiroshima, Hiroshima
	January 1	Yokosuka, Zushi, Kamakura, Hayama and Miura (Kanagawa); Hiroshima and Miyoshi (Hiroshima)
	February 1	Yokohama, Kanagawa and Chiba, Chiba
	April	Amagasaki, Ashiya, Inagawa, Itami, Kawanishi, Nishinomiya, Sanda and Takarazuka (Hyogo)
	April 1	Fukuoka, Fukuoka and Hiroshima, Hiroshima; Higashihiroshima and Hiroshima (Hiroshima)
	May	Adachi, Bunkyō, Edogawa, Fuchū, Koganei, Kokubunji, Kunitachi, Minato, Nakano, Setagaya, Shibuya and Toshima (Tokyo)
	June	Katano and Hirakata (Osaka)
	July	Chiba, Funabashi, Ichikawa, Matsudo, Kashiwa, and Narashino (Chiba)
	September 27	Akitakata and Hiroshima (Hiroshima)
2022	February 1	Chigasaki, Fujisawa and Samukawa (Kanagawa)
	August 18	Saga Prefecture and Ibaraki Prefecture
	November	Tokyo Metropolis with all internal municipalities
	November 24	Saga Prefecture and Fukuoka Prefecture
	December 20	Ibaraki, Tochigi and Gunma prefectures
2023	January 31	Ibaraki Prefecture and Mie Prefecture
	September 21	Ibaraki Prefecture and Tochigi Prefecture
	October 29	Fujisawa, Yokohama and Isehara (Kanagawa)
	October 30	Ibaraki Prefecture and Saitama, Saitama
2024	February 14	Yamato, Ebina, Zama, and Ayase (Kanagawa)
	February 22	Gifu Prefecture and Mie Prefecture
	March 1	Kasugai, Komaki, Toyoyama (Aichi)
	April	Kyoto with Fukuchiyama City, Ayabe City, Kameoka City, Muko City, Nagaokakyo City, Nantan City, Oyamazaki Town (Kyoto); Osaka Prefecture, Osaka City, Sakai City, Ikeda (Osaka); Amagasaki City, Nishinomiya City, Ashiya City, Itami City, Takarazuka City, Kawanishi City, Sanda City, Tamba Sasayama City, Tamba City, Awaji City, Inagawa Town (Hyogo).

Extension to opposite-sex relationships

Some jurisdictions extend partnership oath registries to common-law marriages, in which opposite-sex couples enter live-in relationships without civil registration of marriage. Such protections allow for certification of opposite-sex couples who do not wish to be subject to several mandates regarding marriage, including the legal requirement to share the husband's surname. Tokyo became the first prefecture-level jurisdiction to allow common-law couples to enter partnerships. In April 2024, Aichi Prefecture became the first prefecture-level familyship system to be extended to opposite-sex couples.

Statistics

The first couple to receive a partnership certificate were Koyuki Higashi and Hiroko Masuhara in Shibuya on 5 November 2015. They were personally congratulated by Mayor Ken Hasebe. Later that day, Setagaya issued certificates to seven couples. By April 2017, 17 same-sex partnership certificates had been issued in Shibuya.

319 certificates had been issued in Japan by November 2018. This had increased to 617 by October 2019, to 1,052 by June 2020, to 1,301 by November 2020, to 2,018 by July 2021, and to 3,168 by June 2022, with most being issued in Osaka Prefecture followed by Tokyo, Kanagawa and Chiba prefectures.

As of 1 November 2023, residents in 890 total municipalities are eligible to register their partnerships with a municipal or prefecture government's registry, out of 1,719 total municipalities. All 20 designated cities and 28 out of 62 core cities offer municipal partnership registries, while 18 other core cities are covered by existing prefectural registries and 3 others are set to be covered by 2024. 26 of 47 prefectural capitals offer municipal partnership registries, while 11 other prefectural capitals or seats of government are covered by prefectural partnership registries.

Partnership statistics as of June 2022

Private-sector partnerships

As a private sector response to the lack of national recognition of same-sex partnerships, the Famiee Project created a digital blockchain-secured partnership registry in 2019. In order to receive a Famiee certificate, the couple must apply via a mobile app and will receive a digital certificate to be used as proof of familial status. The Famiee Project received the backing of at least 17 companies who will recognize the digital partnership certificate and treat a couple the same as a different-sex couple for banking and insurance purposes. The partnerships are not currently recognized by the Government of Japan, but aim to create pressure from the private sector for political action to expand LGBT rights in the country.

See also

• Recognition of same-sex unions in Japan
• Homosexuality in Japan
• Marriage in Japan
• LGBT rights in Japan
  • LGBT rights in Tokyo
  • LGBT rights in Ibaraki Prefecture
• Recognition of same-sex unions in Asia