The men (面), literally meaning “face,” is the protective helmet used in kendo and related Japanese martial arts such as naginata, jukendō, and tankendō, where practitioners engage in full-contact training with bamboo swords (shinai). Its development dates to the Edo period (1603–1868), when martial practice in Japan increasingly shifted from battlefield combat to structured dojo training and the need for repeated, realistic practice made protective equipment essential. Drawing inspiration from earlier samurai armor, the men was designed to protect the head, face, throat, and shoulders while preserving mobility, visibility, and breathability. Central to its construction is the metal face grill (mengane), originally forged from iron and later refined using lighter alloys such as duralumin or titanium. Surrounding the grill is the thickly padded cloth body (menbuton), which extends over the crown of the head and down across the shoulders in wide protective flaps known as mendare. A reinforced throat guard (tsukidare) is attached beneath the grill to protect against direct thrusts, while interior padding cushions the face and improves comfort during extended practice. Worn over a cotton headwrap (tenugui) and secured with cords (himo), the men embodies the balance between realism and restraint that defines modern budō, allowing practitioners to train decisively while maintaining safety and continuity with Japan’s martial traditions.