Ma'anar ƙamus na "Nau'in kuɗin kuɗi na Japan" yana nufin tsarin kuɗin da ake amfani da shi a Japan. Kudin hukuma na Japan shine yen Jafan, wanda lambar ISO JPY ke nunawa. An kuma raba yen zuwa ƙananan raka'a 100 da ake kira sen. Yen na Japan ana amfani da shi sosai a kasuwancin ƙasa da ƙasa kuma ana ɗaukarsa a matsayin babban kuɗi a kasuwar musayar waje ta duniya.
