The “difference shelf” is arranged as a set with the “tokonoma”. This is a staggered display shelf, one of the traditional architectural styles.

In addition, there is often a light window between the alcove, which is called the “Shoin”. A set of “Tokonoma”, “Difference shelf”, “Tokobashira”, and “Shoin”, it is a traditional Japanese style called “Shoin-zukuri” that has continued for 800 years.