For ****s sake topre, just license the usage of the technology or something to 3rd companies so we can have more keyboard designs. That's why we can't have nice things.
As mentioned above, Topre
does license their technology. Their collaborators being/having been Leopold, PFU, Ducky and Cooler Master. You have to see Topre as an engine manufacturer, rather than a car manufacturer, if you see what I am getting at. They are however very conservative with their technology, and from what my contact at Cooler Master told me back when I was beta testing the Novatouch, very difficult to work with.
PFU and Leopold don't make Topre keyboards. They are just partners that can sell keyboards that have capacitive switches and because of this partnership the HHKB and FCxxxC series exist. The only manufacturer is Topre and will always be Topre (unless you want to sued)
Actually PFU and Leopold do make Topre keyboards. There are some variances in which parts are provided, but Topre will manufacture the core components (plungers, housings, rubber domes, springs, PCB, keycaps) and supply them to PFU and Leopold.
If I recall, the majority of the FCXXXC boards are manufactured in china (Supposedly in the same place as Varmilo), and then "inspected in Japan." I can't say for PFU considering they're also a Japanese company, but they do build differently than Topre builds their RFs, so who knows.
Until 2014, the FC660M was made in China by Varmilo. Leopold let Varmilo go after they tried to sell FC660Ms with Varmilo stickers. Leopold relocated the fabrication of the 2015 units to Taiwan and Varmilo came out with the VA68 form factor. The FC660C has thus far been made in China.
The new upcoming units will be made in Japan.