Looking for logging into the Nintendo Switch Account site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Nintendo Switch Account site. After that you can login as usual with your login credentials.
https://accounts.nintendo.com/login?lang=ja-JP
https://www.nintendo.co.jp/support/nintendo_account/index.html
https://www.nintendo.co.jp/support/switch/user/index.html
https://support.nintendo.co.jp/app/answers/detail/a_id/32170
https://support.nintendo.co.jp/app/answers/detail/a_id/33852
https://support.nintendo.co.jp/app/answers/detail/a_id/34076
https://support.nintendo.co.jp/app/answers/detail/a_id/32248
https://www.epicgames.com/fortnite/forums/battle-royale/royale-with-cheese/425972-nintendo-switch-with-epic-account-issue
https://support.ubi.com/en-US/faqs/35038/Linking-your-Nintendo-Switch-account-to-your-Ubisoft-account/
https://www.imore.com/how-link-your-nintendo-network-id-your-nintendo-account-nintendo-switch
https://www.inside-games.jp/article/2018/05/16/114724.html
https://www.polygon.com/2018/9/13/17855056/nintendo-switch-online-launch-user-accounts-unlink-how-to
https://www.theverge.com/2018/9/27/17911418/fortnite-sony-ps4-nintendo-switch-link-how-to-account-fix