Given a travel related situation, and given a specific question about the situation, summarize the question into a title
Q: When withdrawing money from a Japan Post ATM using a card (which can act as either a credit card and or an ATM card) from Westpac, the withdrawal is from my credit card account, and I get charged a "cash advance fee"

131313 CASH ADVANCE 1000.00
xxxxxx/JAPANPOST BANK( TOKYO JP
xxx,xxx JPY
xxxxxxxxxxxxxxxxxxxxxxx

131313 FOREIGN TRANSACTION FEE 30.00

131313 CASH ADVANCE FEE - ATM 20.00

What's meant by "Cash advance fee - ATM"? Is it a fee charged by the ATM I'm withdrawing from? How can I minimize it?

A:
How do I minimize cash advance fees when withdrawing from a foreign ATM?