"プロサッカー選手の契約、登録および移籍に関する規則" [Rules for contracting, registering and transferring professional soccer players] (PDF). JFA.jp (in Japanese). Japan Football Association. Retrieved 1 March 2022.
"「ホームグロウン制度」の導入と「外国籍選手枠」の変更について" [About the introduction of the "homegrown system" and the change of the "foreign player quota"]. JLeague.jp (in Japanese). Japan Professional Football League. 20 November 2018. Archived from the original on 20 November 2018.
"「ホームグロウン制度」の導入と「外国籍選手枠」の変更について" [About the introduction of the "homegrown system" and the change of the "foreign player quota"]. JLeague.jp (in Japanese). Japan Professional Football League. 20 November 2018. Archived from the original on 20 November 2018.
