Oishimo

A town on the sky island of Birdcage Hollow, it was the place where Tubel lived and is the birthplace of Oishimo Steel, a powerful metal developed by Tubel.

Plue Presents: Fables of The World
Excerp from Tale 08:
 * There is a legend among the warriors that know of Oishimo Steel that if a warrior were to see their blade being made they would not be powerful enough to use it effectively.