https://www.mext.go.jp/b_menu/shingi/chousa/koutou/126/siryo/1408398_00001.html
https://www.koeki-info.go.jp/
https://www.kansa.or.jp/news/post-9977/
https://www.nta.go.jp/law/tsutatsu/kobetsu/hyoka/r05/2306_02/index.htm
https://www.maff.go.jp/j/keiei/tyosei/inboisu.html
https://www.digital.go.jp/policies/account_registration_faq_03/
https://www.mext.go.jp/b_menu/shingi/chousa/koutou/126/siryo/1408398_00013.html