You can instantly obtain a digital mastercard
You can request a physical visa card (for $6) - and you still get the card details for electronic use effectively instantly.
Get yourself a referral from here: (you get a free card or zero fees on a transfer up to A$1,000.)
https://www.ozbargain.com.au/deals/wise.com
Having created the account, click Add Money. Select Japanese Yen. Pay in AUD. Pay with Pay ID / bank transfer / credit card or debit card.
1 AUD = 100.951 JPY
Disclaimer - Not financial advice - and I don't have a crystal ball - But if you are happy to lock in that particular conversion rate and intend on travelling to Japan soon, then it may be worth considering this forex.

Financial advice?
Do you have a Financial Services license?