Kuretake Seishodo Seiran-ka (Blue Iris) 5.0 Cho (unit of measurement for ink sticks) Blue Ink Retail Price: 26,250 yen My father, who was a calligrapher, is closing his calligraphy class, and I am selling some of the items he had collected. This is Seiran-ka, a blue ink. It has a clear, bright blue hue reminiscent of a clear stream, and the ink color becomes even more vivid when the artwork is mounted. It is especially effective for flowing characters. The ink stick feels a bit hard on the suzuri (ink stone). We appreciate your understanding and look forward to your purchase.