More importantly for watch lovers, the Seiko Epson Corporation also has the Shinshu Watch Studio, which is responsible for the manufacturing and R&D for all of Seiko’s Spring Drive, Quartz, and GPS-related technology. Seiko Epson Corporation feeds into Seiko Watch Corporation, which then manages the sales, marketing, manufacturing, and R&D for Credor, Seiko, and Grand Seiko. Shinshu is one of the few fully integrated watch manufacturing facilities in the world, so getting to see even a portion of the work done there is pretty unusual.
AloJapan.com