This is hard-pen calligraphy paper from the Nihon Kyoiku Shodo Kenkyukai (Japan Education Calligraphy Research Association). Photo 2: Hard-pen paper D, bundle (31 sheets), loose (12 sheets) Photo 3: Hard-pen paper D, bundle (46 sheets), loose (4 sheets) Photo 4: Hard-pen paper E, the previous type of hard-pen paper, slightly yellowed. I am offering these for sale as practice paper. Thank you for looking.