so...
i did some calculation
a stack of 1000 yen notes is approximately 150mm x 76mm x 100mm
so 1,140 cm³
a single cm³ of 24 karat gold is 19.32 grams, so it would weight 22,024.8 grams
and the current bid price is around 61.88 usd per gram
it would equal to 1,362,894.624 usd, or 195,471,117.11...