How can I send money in my account to Japan keeping them as Pound?

How can I send money in my account to Japan keeping them as Pound?

I can’t find choose GBP to GBP on the international transfer page. (Wise)

Are you sending to a UK bank account? If so it’s just normal transfer as you would friend or family.

Wise and most companies do not support that.

If you have a GBP account in Japan, you would need to do a GBP SWIFT transfer which will be very expensive and may incure fees to send and receive.

Wise has significant limitations and normally only supports native currency for the target market, apart from very few exceptions.