This is a genuine indigo-prepared pine soot blue ink, rarely seen in stores these days. It is a valuable item, a pine soot blue ink kneaded with genuine indigo. Eiichi Shibusawa, who was born and raised in Fukaya City, Saitama Prefecture, came from a family of indigo farmers. The pure pigment extracted from the indigo leaves, which also appeared in the historical drama "Reach Beyond the Blue Sky," is a very expensive and valuable item. Because it is kneaded with highly transparent glue, it produces a vivid, natural indigo color that cannot be achieved with pigments. This indigo ink was once beloved by sumi-e painters and calligraphers and can be used for various creations. For diluted ink, it has a slightly bluish gray color, with clear bleeding and strong base lines. For non-glossy, concentrated ink, it is recommended for genuine blue ink works. It is ideal for calligraphy, sumi-e painting, haiga (haiku painting), and letter art, as well as other diluted ink works. This is a high-quality blue ink with a list price of 15,750 yen (including 5% tax). Size: Approx. 109 x 27 x 15 mm Weight: approx. 57g * New, unused, comes in a paulownia wood box. The photos are of the actual product.