The term 'SAMURAI's weapon' can be summarized by two crossword solutions: katana (6 letters) and SWORD (5 letters). A katana is a type of Japanese SWORD characterized by its curved, single-edged blade with a circular or squared guard and long grip to accommodate two hands. It was traditionally used by the SAMURAI class of feudal Japan. A SWORD is a bladed weapon consisting of a long blade attached to a hilt. It is usually double-edged and has been used throughout history for combat.