I need to send 8 million yen from the UK to Japan.

I’m a PR and need to move around 8million yen from a UK account to Japan as soon as possible. I live in a fairly rural area and my only Japanese account is at a local bank. I have a Japanese Wise account, but large transfers don’t seem possible. What should I do? I can’t open a Sony foreign exchange account, as my App Store is set to the UK.