Horimono
Horimono (彫り物, 彫物, literally carving, engraving), also known as chōkoku (彫刻, "sculpture"), are the engraved images in the blade of a nihonto (日本刀) Japanese sword, which may include katana or tantō blades. The artist is called a chōkokushi (彫刻師), or a horimonoshi (彫物師, "engraver").