[Guaranteed authentic] Yoshihara Jiro Work Paper, Gouache (Gutai Art Association, Shiraga Kazuo, Shimamoto Shozo, Yoshihara Michio, Motonaga Sadamasa, Tanaka Atsuko, Matsutani Takesada, Horio Sadaharu, Matsuda Yutaka), Artwork, Painting, acrylic, Gash