Dirk at JapanExposure can check too.
"MS Optical R&D is a small company situated in Funabashi City in Chiba prefecture run by Mr S Miyazaki. MS Optical produce fine optical equipment, such as our MS-MAG viewfinder magnifiers, lenses and other high quality accessories. Within Japan, MS Optical is well-known for converting lenses made for older cameras or completely different camera systems such as Contax G to the Leica mounts. The image on the right shows a Leica M6 with Carl Zeiss G Planar 35/2.
MS R&D neither ships nor takes orders from outside Japan, but our special relationship with Mr Miyazaki allows us to provide you access to his specialist lens conversion services that are renowned worldwide. We now also offer pre-converted G lenses ready to use on Leica M mount cameras."