Noritsu Koki Co., Ltd. is a Japan-based holding company primarily engaged in manufacturing through its subsidiaries, focusing on parts and materials as well as audio equipment and peripherals; it operates globally across Japan, China, the United States, Europe, Central and South America, the Middle East, Africa, and other international markets. Founded in June 1951 and formally established in June 1956, the company is headquartered at Joule A 5th Floor, 1-10-10 Azabu-juban, Minato-ku, Tokyo, Japan, with key subsidiaries including Teibow, which holds approximately 50% global market share in felt-tip pen nibs and produces pen components, cosmetic components, and metal parts via metal injection molding (MIM) technology; AlphaTheta (formerly Pioneer DJ), commanding about 70% of the worldwide DJ equipment market with professional DJ gear, entertainment systems, and software integration; and JLab, a leading U.S. manufacturer of affordable headphones, earphones, and audio accessories under the JLab brand. The company has divested its original photo processing equipment business, including minilabs that once held over 50% global share, and relocated headquarters from Wakayama to Tokyo in 2015; recent developments include the 2022 partial sale of its stake in healthcare firm JMDC to OMRON for significant profit, cancellation of the Serato acquisition in 2024 leaving substantial cash reserves, ongoing implementation of Medium-Term Management Plan FY25 emphasizing organic growth in core manufacturing units, and a planned reorganization effective April 1, 2025, to establish Teibow Holdings as an intermediate holding company owning Teibow and Hamamatsu Metal Works.