Description: This cylindrical tea bowl is defined by its vertical form and the layered depth of its glaze. The surface is finished in a Yohen (kiln-transformed) Shinsha (oxblood) glaze, where copper-based tones shift across deep crimson, violet, and passages of cerulean blue, emerging through the firing process. Horizontal throwing marks (rokuro-me) encircle the body, creating a subtle rhythm that interacts with the glaze as it gathers and thins along the surface. Toward the rim, the edge rises with a slight undulation, softening the otherwise upright profile. Inside, the glaze deepens toward the base, where it settles into a darker, glass-like pool. In contrast, the foot is left unglazed, exposing a pale and coarse clay body typical of Mashiko stoneware, setting a clear boundary between the finished surface and the underlying material. The piece is accompanied by a signed wooden storage box (tomobako). Dimensions: Diameter: 12 cm Height: 10.5 cm Weight: 530 grams Condition: No chips, cracks or restorations. Artist Profile: Ryuzan / 龍山 (Dates unknown). A ceramic artist associated with Mashiko ware, a traditional pottery practice from Tochigi Prefecture. While detailed biographical information is limited, his work follows the Mashiko approach to functional stoneware with an emphasis on surface variation and material presence. This piece bears his signature seal, and the accompanying wooden box is inscribed, identifying him as the maker. Additional Notes Please review all photos carefully as they are part of the item description. Shipping Information: All items are shipped from Japan via DHL or Japan Post, depending on the destination. Each piece is carefully packed using professional materials suitable for fine art shipping. A tracking number will be provided once the shipment has been dispatched. Shipping costs vary by item depending on the nature of the work, its size, and shipping requirements. For some pieces, shipping may be included as part of the overall service. Shipping conditions are clearly stated for each individual listing. We cannot under-declare item values or mark shipments as gifts. Import Duties & Taxes: Import duties, VAT, and any additional customs or processing fees are not included in the auction price. These charges are the responsibility of the buyer. Please check with your local customs office for details before bidding. Customs Communication: Customs or the shipping carrier may contact you for additional information (such as ID verification or payment of duties). Please respond promptly to avoid delays or returns. Thank you very much for your understanding and cooperation.