The inro is a container made up of tiers. Japanese men used them because the traditional Japanese garment, the kimono, had no pockets. From the late 1500s onwards, Japanese men wore the inro suspended from their sash by a silk cord and a netsuke (toggle). They originally used it to hold their seal and ink or a supply of medicines. However, it rapidly became a costly fashion accessory of little or no practical use. Most inro are rectangular with gently curving sides.
Lacquer was most commonly used in the manufacture of inro since it was highly suitable for storing medicines. Lacquer is the sap from the tree Rhus verniciflua that grows mainly in East Asia. After processing, it is applied in many thin layers to a base material. The craft of lacquering, as well as making inro bodies, is highly complex, time-consuming and expensive.
This inro is decorated with the Chinese God of Literature perched on the back of a dragon-fish, a mythical fish. The God holds up a box under a constellation in the sky. It has been possible to trace the source of this design to a page from the woodblock-printed book Morokoshi kinmo zui, published in 1719 and illustrated by Morikuni.