Spring Drive: Five Stories of the Pursuit of Precision

Spring Drive is an innovative, high-precision, uniquely engineered movement born from the fusion of Japan’s world-renowned technology and master craftsmanship. Though the technology was first introduced in 1999, it was not until 2004 that Caliber 9R Spring Drive debuted as a Grand Seiko-exclusive movement. This was followed by the introduction of the Spring Drive Chronograph; by Calibers 9R01 and 9R02, crafted by the Micro Artist Studio; and by Calibers 9RA2 and 9RA5, both featuring five days of power reserve. In 2025, the Spring Drive U.F.A. Caliber 9RB2 was introduced, achieving an astounding accuracy of ±20 seconds per year.

This special site explores the evolution of Spring Drive—a groundbreaking movement powered by a mainspring and regulated by a quartz oscillator—through five stories. These narratives trace the continuous pursuit of precision from Spring Drive’s initial development to the present day.