This papercraft is Mogami Yoshiaki‘s Armor, Nimai-Do Armor. The paper craft is created by Mogami Yoshiaki Historical Museum. There is also his helmet paper model here: Japanese Feudal Warlords Helmet Papercraft – Mogami Yoshiaki. Mogami Yoshiaki was a daimyō of the Yamagata domain in Dewa Province, in the late Sengoku period and early Edo period.
For more japan’s Feudal Warlords papercrafts visit the topic: Japanese Feudal Warlords Helmet Papercrafts Collection