K.uno CO LTD. is a Japan-based jewelry manufacturing and retail company that specializes in the design, custom fabrication, alteration, and sale of fine jewelry, bridal jewelry, and bespoke timepieces. The company operates through an integrated design-to-production business model, maintaining in-house designers and craftspeople across its retail network to deliver customized and made-to-order products. Its core products and services include custom-made and ready-to-wear engagement rings and wedding bands; fine fashion jewelry comprising necklaces, pendants, earrings, brooches, and bracelets; customized luxury watches; licensed character jewelry and accessories under dedicated lines and its U-TREASURE brand, featuring intellectual properties such as Disney, Pokémon, and entertainment franchises; jewelry remodeling, resizing, stone resetting, and comprehensive maintenance and repair services; in-store DIY jewelry-making workshops; and corporate original equipment manufacturing (OEM) and custom gift fabrication solutions. Founded in 1981 and incorporated in 1991, the company is headquartered in Nagoya, Japan. K.uno CO LTD. conducts retail and business operations primarily across Japan, alongside an expanding overseas presence in Taiwan and manufacturing facilities managed by its production subsidiary, U-International Factory Co., Ltd., in Thailand. In recent developments, the company completed its initial public offering on the Nagoya Stock Exchange Next Market in October 2024 under the ticker 259A. The company has continued its strategic expansion by opening additional retail boutiques in Taiwan, introducing the tonoiro craft brand tailored for inbound tourism and experiential customization, and scaling its licensed character collaborations and corporate B2B jewelry OEM partnerships.