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Japanese samurai helmet
Kabuto (兜, 冑) is a type of helmet first used by ancient Japanese warriors, and in later periods, they became an important part of the traditional Japanese armour worn by the samurai class and their retainers in feudal Japan. Japanese helmets dating from the fifth century (long before the rise of the samurai class) have been found in excavated tombs. Called mabizashi-tsuke kabuto (visor-attached helmet), the style of these kabuto came from China and Korea and they had a pronounced central ridge.