Mid-Edo period (1615-1687)18th centuryThe helmet is of goshōzan shape, slightly raised at the back. It is composed of 62 vertical, slightly convex plates lacquered in black urushi. Each plate is bordered by a gilt copper border in the sō-fukurin style. This style of decoration was introduced by the armorers of the Haruta school during the Muromachi period (1336-1573) for their akoda-nari kabuto and, in addition to the aforementioned fukurin, provides for shaped gilt ornaments at the base of each plate (higaki). The tehen-no-kanamono that adorns the top of the helmet is five-tiered. The visor...