Looking for logging into the Nintendo Network Id 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 Network Id site. After that you can login as usual with your login credentials.
https://accounts.nintendo.com/login?lang=ja-JP
https://support.nintendo.co.jp/app/answers/detail/a_id/32170
https://www.nintendo.co.jp/support/nintendo_account/index.html
https://support.nintendo.co.jp/app/answers/detail/a_id/32231
https://www.nintendo.co.jp/support/nintendo_network/account/3ds.html
https://support.nintendo.co.jp/app/answers/detail/a_id/33739
https://www.nintendo.co.jp/support/nintendonetwork/QA_ja.html
https://support.nintendo.co.jp/app/answers/detail/a_id/32222
https://www.howtogeek.com/296972/all-of-nintendos-confusing-online-accounts-explained/
https://id.nintendo.net/login
https://www.imore.com/how-link-your-nintendo-network-id-your-nintendo-account-nintendo-switch
https://majien.com/nnid-mail/
https://www.theverge.com/2017/2/20/14673212/nintendo-user-id-online-accounts-network