bank transfer or paypal?

I am planning to make the payment tomorrow. I’m not yet sure how – do you have experience of British clients paying JPY directly? Is a payment with PayPal an option?
Your bank will make the conversion and detract the relative amount in GBP from your account. Wire transfer is the system used more often, also by British clients.

We can also accept paypal but the fee for transaction is 4% on the transferred amount, which makes it more expensive in this case.

Considering that the wire transfer fee is 6500 JPY, consider that a Paypal payment is more convenient for purchases below 150,000 JPY (about 1500 USD).
For larger amounts, wire transfer is more convenient.