This is a pure sheep wool brush from the prestigious Kubota-go in Kumano Town, Aki District, Hiroshima Prefecture. The inscription "Shinyu Gen" is one of Kubota-go's representative銘筆 (famous brushes), possessing the rich expressiveness unique to sheep wool brushes, balancing suppleness with a firm writing feel. ■Product Details • Manufacturer: Kubota-go (くぼたごう) • Inscription: Shinjō Shinyu Gen (宿浄 思入玄) • Engraving: "Kubota-go Saku" (久保田号作) on the lower part • Measured Size: • Total Length: Approx. 27.5 cm • Bristle Length: Approx. 5.0 cm • Bristle Diameter: Approx. 1.1 cm (※These are measured values using a tape measure. Please confirm in the photos.) ■Condition • This is a used item. • There is ink residue on the bristles and signs of use. • There are age-related cracks (lines) on the shaft. While we believe it does not significantly affect usability, please consider purchasing only if you understand the characteristics of old tools. • Please check the photos thoroughly for details. ■Notes • This item is used and has been stored in a private home by an amateur. • Product details are based on AI image analysis and independent research. There is a possibility of errors, so please make your final judgment on the condition and details from the photos before purchasing. ※Negotiations for sets with other items are possible.