A zunari-type kabuto papercraft (head-shaped samurai helmet) by the Honda Museum in Ishikawa Prefecture, Japan.
This particular Honda Museum is not related to the big motor company but instead is a specialty museum that houses artifacts from the Honda clan - a very important (historical) Japanese family.
The samurais of those times found their kabutos boring so they added masks, visors, or face guards shaped into the likeness of supernatural beings, such as demons, to intimidate their enemies.
This kabuto papercraft has a beak-shaped face guard to resemble a Kappa.
Zunari Kabuto Papercraft (Samurai Helmet) [Download]