Papercraft Kamen Rider Riderman Chibi

Riderman (ライダーマン Raidāman?) (also known as The Avenging Demon or Kamen Rider 4) is a fictional character, ananti-heroic protagonist from the tokusatsu television series, Kamen Rider V3. He was the first Kamen Rider to wield personal weapons, and the first (and so far only) Kamen Rider whose face is partially exposed. He is portrayed by Takehisa Yamaguchi (山口 豪久 Yamaguchi Takehisa?) credited as Satoru Yamaguchi (山口 暁 Yamaguchi Satoru?) in the original V3 series.

source : Wikipedia
This is Papercratf Kamen Rider Riderman Chibi version.