I received multiple email requesting security code from unknown person using my gmail as recovery

Question

All emails were sent to me in Japanese

Frist 3 emails セキュリティ コード are requesting security codes

then another one

セキュリティ情報の置き換え requesting to replace security information

Are these phishing scams?

I didnt click any links in the emails btw

I only have one account with Microsoft and my gmail was one of the recovery emails I set up with

I went to microsoft website and checked if there's any other account linked to my gmail

it showed up ni***@outlook.jp** same account shown in the email

Does anyone know how to unlink strangers' Microsoft account using my gmail as recovery?