On the donation form page, if you select JPY (Japanese Yen), the suggested donation amounts do not change and are ridiculous suggestions for JPY. A donation of 35 JPY is $0.42 USD.
The suggested amounts are fine for CAD, AUD, GBP, and EUR, even though due to currency rates, the actual donation amount when converted will vary some.
I'm not sure about the other listed currencies. There should be some smart adjusting, if the currency difference is so great.