Japan Amazon phone but can’t download Japan apps

I bought a Xiaomi 15 phone recently on Amazon co jp. I live in Japan and I'm discovering it doesn't download Japan apps like PayPay and Bic Camera. Is there a solution for this?

Update: Thanks everyone. As advised, I just started a new Gmail account. They seemingly automatically knew I was opening it from Japan. Then, Playstore was in Japanese and accessible. Also, Aurora Store was interesting.

by Loud-Butterfly3426