Amazon AU account. Want to order a gift from Amazon Japan to a Japanese address.

Because my Amazon account is in Australia, and my friend lives in Japan, I want to send gifts purchased from Amazon Japan to the friend’s address in Japan. However when I try to log into Amazon Japan using my Amazon Australia credentials, I am redirected to make a brand new account.

I do not want to make another account. I want to use my Australian account. Has anyone else found a workaround for this? Any advice will really be appreciated.