An exceptional Kutani porcelain vase by Tokuda Yasokichi III (徳田八十吉〈三代〉／Tokuda Masahiko), officially designated a Living National Treasure of Japan. This work exemplifies his internationally acclaimed mastery of “Yōsai (窯変) gradation glaze”, where deep cobalt blue transitions seamlessly into luminous turquoise and jade tones. The form is elegant and restrained, allowing the glaze itself to command attention. The surface displays a mirror-like depth with subtle vertical movement in the color layers, a hallmark of Tokuda Yasokichi III’s mature period. The vase is accompanied by its original signed wooden tomobako, further confirming authenticity and elevating its collector value. Artist & authentication (confirmed from images) Artist: Tokuda Yasokichi III (徳田八十吉 三代 / Tokuda Masahiko) Status: Living National Treasure of Japan Signature: Red underglaze signature on the base Original tomobako: Present, with handwritten inscription and red seal Documentation: Original paper included Material Porcelain (磁器) Condition Very good condition No cracks, chips, or restorations observed Glaze surface is clean and highly lustrous Wooden box shows minor age-appropriate wear Please review all photographs carefully for precise condition details. Size (confirmed) Mouth diameter: 4.8 cm Foot diameter: 6.8 cm Height: 20.8 cm Maximum width: 11.4 cm Estimated production period Tokuda Yasokichi III was active under this name from 1988 until his death in 2009. Based on the glaze maturity, form, and box style, this piece is assessed as being produced circa 1990s–early 2000s. This is a carefully reasoned estimate, stated transparently without absolute certainty. Kutani, Tokuda, Yasokichi, Vase, Porcelain, Japanese, Ceramic, Yosai, Gradient, Blue, National, Treasure, Signed, Tomobako, Art, Craft, Modern, Collectible, Master, Japan 【Important Information】 ・International customers are responsible for any import duties, taxes, and fees not included in the item price or shipping costs. Please note that the VAT paid to Catawiki is separate from and does not include your country's import duties or customs clearance fees. Additional charges may be levied upon delivery at the discretion of your local customs authorities. We strongly advise checking with your country's customs office regarding these potential additional costs before bidding or purchasing. Prompt payment of these charges ensures timely delivery. ・Delivery Details: Most items are shipped via Japan Post (airmail). Upon request, delivery via DHL or FedEx can be arranged at an additional cost. ・Damage or Issues: Should you receive a damaged item, please contact us immediately before leaving a negative review. We appreciate your understanding and cooperation. For damage claims, please report to your nearest post office within 7 days of delivery. Please also promptly contact us and Catawiki Support. ・Due to the suspension of the “de minimis” exemption in the United States, import duties may be higher for shipments to the US. US bidders should be aware of this. As EMS shipments to the US are currently suspended, we will ship via DHL. Shipping costs will be higher than before; we appreciate your understanding.