Darih is the name of the primary currency of the countries of Naiakana and Nareikk, and is used widely in both countries. The currency is the largest in the countries, and is greater in value than both the Danisi and the Ersahi, being the half and quarter Darih respectively.
Darih, Ersahi and Danisi are all mentioned frequently in Violet Sword Blade, a book in the Untaer Archives which takes place in Nareikk. In the book, the protagonist, Mazzek Kein Rettensauth, sells a small sword for four Darih in order to eat, and in the hamlet of Sornbridge a guard of the Army of Nareikk charges two Darih as a toll to cross the bridge. The other currencies are mentioned tangentially throughout the rest of the book.