Lewm, I don't have any first hand evidence, but this is claimed on numerous forum discussions and websites, including vintageknob. I shouldn't have stated it as fact the way I did, but there is at least some circumstantial evidence. According to vintageknob the Nakamichi TX-1000 was also built by Micro to Nakamichi's specifications. As for 'some' Luxmans, the PD-300, 310 and 350 belt drives were almost certainly built by Micro (hard to miss considering the many design similarities), but it might be the case with the PD-444 direct drive as well.
Also according to the vintageknob there were only a handful of manufacturers of DD motors at the time, which were used by all Japanese brands. Micro was basically a precision mechanical engineering company, so it is very unlikely they built DD motors or speed control electronics themselves.
I remember reading a TAS article some years ago describing the Japanese audio ecosystem, which over many decades evolved into a network of companies and designers closely working together. So plenty of overlap indeed as Totem395 suggests. It would be interesting to read a history some day on how this ecosystem operated and who were the designer teams responsible for the top DD tables we hold so dear.
Also according to the vintageknob there were only a handful of manufacturers of DD motors at the time, which were used by all Japanese brands. Micro was basically a precision mechanical engineering company, so it is very unlikely they built DD motors or speed control electronics themselves.
I remember reading a TAS article some years ago describing the Japanese audio ecosystem, which over many decades evolved into a network of companies and designers closely working together. So plenty of overlap indeed as Totem395 suggests. It would be interesting to read a history some day on how this ecosystem operated and who were the designer teams responsible for the top DD tables we hold so dear.