About PFU and specs

 
The HHKB uses Topre switches – which we previously mentioned in an article – which are exclusively tactile and have an actuation weight of 45g. The tactile bump is due to the membrane component of the switch. This translates into a board which is exceedingly comfortable to type on. The technology behind it ensures that the circuit is closed by the PCB sensing the capacitance change when the switch is pressed.
 

PFU Limited is a Japanese IT company formed by the merger of Panafacom and USAC Electronic Industrial in 1987. It produces image scanners, embedded computers and Topre keyboards.

As a bit of a history lesson, Panafacom was a conglomerate formed in 1973 by the Japanese companies Fujitsu, Fuji Electric and the Matsushita Group. It also developed one of the first commercially available 16-bit CPU, the MN1610 which would go on to be the brain around which they would build popular computer kits and computers which turned out to be very popular in Japan.

PFU has become a wholly owned subsidiary of Fujitsu in 2010 and it is the reason why you will encounter the moniker PFU/Fujitsu when referring to them.

What we should keep in mind from the above is that this is a company with a long and solid history of making cool stuff. And the HHKB is indeed cool stuff.