Description: About Haiyū (灰釉 / Ash Glaze) The term Haiyū refers to a traditional ash glaze made by combining natural wood ash with clay and feldspar. When fired, the ash melts into a smooth, glassy surface that produces soft shades of gray, green, or bluish tones. This type of glaze has been admired since the Nara and Heian periods for its organic texture and serene color variations. The glaze is unpredictable, making each piece one of a kind. About Yōhen (窯変 / Kiln Transformation) Yōhen, literally meaning “kiln change,” describes the spontaneous transformations that occur during the high-temperature firing process. Variations in flame, temperature, and oxygen levels cause natural shifts in color and texture. These transformations are uncontrollable and unrepeatable, giving each tea bowl a unique landscape of patterns and tones. Yōhen pieces are especially prized among tea practitioners and collectors for their depth and individuality. Design and Coloration This tea bowl features an exceptionally beautiful gray-ash glaze with subtle gradations of black and silver-white, creating a marbled, almost cosmic visual effect. The surface reveals intricate crackle-like patterns that recall clouds or ink washes. Depending on the lighting, the bowl shimmers softly—evoking the quiet glow of moonlight through mist. Its rounded form and smooth rim make it comfortable to hold, enhancing both aesthetic and tactile pleasure. Original Wooden Box (Tomobako / 共箱) The bowl comes with its original signed wooden box, confirming its authenticity and preserving its value. The calligraphy on the lid indicates the title and possibly the potter’s name, reflecting the traditional Japanese custom of matching fine tea bowls with personally inscribed boxes. Estimated Period: Likely from the late Showa to early Heisei period (1970s–1990s), when a number of skilled studio potters revived ancient glaze techniques using natural ash and experimental kiln atmospheres. Condition: Excellent condition with no chips, cracks, or repairs. The surface shows natural kiln variations that are part of its intended aesthetic character. Expert’s Insight: This Haiyū Yōhen Chawan exemplifies the harmony between nature and artistry that defines Japanese ceramics. The delicate balance of gray tones and the soft flow of kiln transformation evoke the subtle beauty of ink landscapes. Its presence is calm yet powerful—a meditative vessel embodying impermanence and spontaneity. The combination of its elegant glaze and the inclusion of the original wooden box makes it a highly desirable piece for collectors and tea practitioners alike. Antique/Vintage Notice: This is a vintage item. Please note that it may show natural signs of age, such as minor wear, slight discoloration, or subtle imperfections. These characteristics are part of its history and enhance its authenticity. Shipping & Handling: We ship worldwide from Japan using insured and trackable services. All items are professionally packed to ensure safe delivery. Import duties or customs fees are the buyer’s responsibility. Delivery may take time depending on your location. Feel free to reach out with any questions.