Inside Casio’s Yamagata Factory: Where Made-in-Japan G-Shocks Take Shape
Yamagata Casio in Higashine, Japan, is the company’s only domestic watchmaking facility and its “mother factory,” overseeing production while most high-volume manufacturing takes place overseas. The factory makes watches labeled “Made in Japan,” including the screw-back GW5000U, and combines industrial processes such as movement production, injection molding, dial finishing, and precision CNC machining. Its operations include seismic isolation systems to stabilize machinery during earthquakes. The Premium Production Line assembles and inspects high-end models, including MR-G, Oceanus, MT-G, and Gravitymaster watches. Skilled staff qualify through a five-tier certification system, with Gold Medal or higher required to work on the line. Though Casio is primarily an electronics manufacturer rather than a traditional watchmaker, its Japanese-made watches have a devoted following, especially among G-Shock enthusiasts.
Buying Time Analysis: This story offers a rare look inside Casio’s Yamagata factory, revealing how its Japanese-made watches are engineered, assembled, and inspected—and why the facility is central to the brand’s manufacturing and G-Shock legacy.
