What is Sashiomote in Japanese Katana terminology?

"""Sashiomote"" (差表) refers to the outer side of the Uchigatana (打刀) when it is worn at the waist, facing away from the body.

The signature of the swordsmith (作者銘, Sakushamei) is almost always inscribed on the Sashiomote side of the Uchigatana. This inscription not only identifies the maker of the sword but also adds to its historical and cultural significance. The fact that the inscription is placed on the Sashiomote side, which is visible when the sword is worn, also reflects the aesthetic considerations in Japanese sword making."