This papercraft is Maeda Toshimasu‘s Armor. The paper craft is created by Yonezawa Naoe. There is also his helmet paper model here: Japanese Feudal Warlords Helmet Papercraft – Maeda Toshimasu. Maeda Toshimasu, better known as Maeda Keiji or Keijirou, was a Japanese samurai of the Sengoku Period through early Edo Period.
For more japan’s Feudal Warlords papercrafts visit the topic: Japanese Feudal Warlords Helmet Papercrafts Collection