Mempo (also menpō, mengu or occasionally men yoroi), is the term for various types of facial armour worn by the samurai class and their retainers in feudal Japan. Types of Japanese facial armour include the somen, menpō, hanpo and happuri. Mempo were facial armour which covered all or part of the face and provided a way to secure the top-heavy k... Found on http://en.wikipedia.org/wiki/Mempo
Face mask or plate worn with armor, popular from the mid-16th Century and progressively more elaborate as time went on. Found on http://www.samurai-archives.com/vocab.html