noun
10,000 yen
The standard Japanese 10,000-yen note or amount. 壱万円 is used in legal/financial documents to prevent alteration.
一万円札で支払った。
I paid with a 10,000-yen bill.
この本は一万円もした。
This book cost as much as 10,000 yen.
Compound of 一万 (いちまん, 'ten thousand') + 円 (えん, 'yen').