Taizo Yamamoto joined his family company ”YAMAMOTO PAPER” in 1999. Taizo started to offer custom printing and design. Yamamoto Paper began to produce original paper items in 2005. Then Yamamoto Paper exhibited at TOKYO INTERNATIONAL GIFT SHOW for the first time. Taizo started to print by Old Heidelberg windmill platen letterpress, and produced original stationery. In 2009, YAMAMOTO PAPER established “yama-kami letters” brand. Then yama-kami letters exhibited at New York Gift Show.