This papercraft is Honjo Shigenaga‘s helmet, Hoshi Kabuto Helmet. The paper craft is created by Yonezawa Naoe. Honjō Shigenaga (本庄 繁長) was a Japanese samurai of the Azuchi-Momoyama Period through Edo Period, who served the Uesugi clan (The Uesugi are perhaps best known for Uesugi Kenshin, one of Sengoku's more prominent warlords). He held the court title Echizen no kami. Shigenaga fought at the Battle of Kawanakajima.
For more japan’s Feudal Warlords helmet papercrafts visit the topic: Japanese Feudal Warlords Helmet Papercrafts Collection