Aeon watami visa
Transaction Date: 22 Nov 2014
Posting Date : 24 Nov 2014
Transaction Amount : Yen 12400
Amount Charged : RM358.69
Exchange Rate : 0.0289266129
Forex Rate : 1 JPY = 0.0286503767 MYR
Bank fee = 0.96%
Transaction Date: 23 Nov 2014
Posting Date : 25 Nov 2014
Transaction Amount : Yen 72000
Amount Charged : RM2073.15
Exchange Rate : 0.02879375
Forex Rate : 1 JPY = 0.0286503767 MYR
Bank fee = 0.5% (no more -1% but this is still attractive)
You should calculate based on Visa's rate (http://usa.visa.com/personal/card-benefits/travel/exchange-rate-calculator.jsp)