The Grand Seiko can be considered the top Japanese wristwatch in production today. The Shizuku-ishi Watch Studio carries out production of these high-grade mechanical watches through the full integration of parts manufacturing through to assembly, adjustment, and packaging. The watch studio, a rare example anywhere of end-to-end master craftsmanship that deserves the label "manufacture d'horlogerie," is located on the premises of Morioka Seiko Instruments.
To achieve the high accuracy and durability of the Grand Seiko, MEMS technology and cutting-edge laser welding techniques are used in combination with extremely high-level manual skills practiced by technical experts in assembly and adjustment. The facility is successful in producing watches with the highest level of precision in the world.
Adjustment of the balance wheel on which the balance spring is attached, for example, determines the accuracy of the watch and is performed using a machine developed by Seiko that assures stable, high precision. The problem is that in manufacturing industrial parts, an error of 0.001 mm will sometimes occur within a certain range in the design drawings. Even if stipulations are met for parts individually, sometimes with bad luck two parts that have a tiny fraction of an error in combination will not pass the strict requirements set for the Grand Seiko. But even such parts can be adjusted by hand by a highly skilled technical expert to meet the requirements. The fingers of the artisan are superior to any machine and produce a watch with the highest accuracy and reliability.
Also, because we manufacture even tiny parts at the production facility, if there is ever a problem, instructions can immediately be communicated to produce an improved part. This is the greatest advantage of a manufacture d'horlogerie, which is used to produce a truly special wristwatch of tremendous reliability and high quality that the consumer can use and love for years.
Established on the premises of Morioka Seiko Instruments Inc., the studio is dedicated to creating luxury Seiko mechanical wristwatches. The studio has a clean room in which each artisan has a workbench space with an Aeron chair that is equipped with his or her favorite tools, arranged however the individual artisan wishes to elicit the best craftsmanship possible.