AnthoDerv, Kobe and Sendai are the last 政令指定都市 cities to introduce a same-sex partnership system.
:ginnan:
TIL:
A Japanese city designated by government ordinance (政令指定都市, seirei shitei toshi), also known as a designated city (指定都市, shitei toshi) or government ordinance city (政令市, seirei shi), is a city that has a population greater than 500,000 and has been designated as such by order of the Cabinet of Japan.
:benishoga:
https://en.wikipedia.org/wiki/Cities_designated_by_government_ordinance_of_Japan