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 Japanese sword, which may include katana or tantō blades. The images are most often carved into ceremonial blades due to the inherent weakness associated with the compromised integrity of a carved b.....
Carving on blades.
Carvings on sword blades.
Decorative carving (Japan)