Here's what the Sadowsky website has to say:
"Sadowsky MetroLine basses are produced by Roger’s personally trained protégé, Yoshi Kikuchi, in Tokyo, Japan. A superior craftsman in his own right, Yoshi moved to New York for a year to learn the art of the Sadowsky Bass at Roger’s side. Yoshi then assembled a small group of Japanese craftsmen and opened a studio in Japan under Roger’s supervision. As a result, Roger is able to deliver the legendary Sadowsky Bass more immediately and more affordably to you, the working bass player".