On Fri, 19 Jan 2018 04:50:03 GMT, Tim wrote:

There was a Japanese company that came out with a code-compatible mainframe
that was supposed to be bigger, better, faster, etc. One of the selling
points given to the techies was that they HAD gone back and provided
compatability without all that overhead because they had started from
scratch so much later in the design cycle of the /370s.

I want to say Fujitsu, but can't say for certain.

I seem to recall that Fujitsu was the parent company and the computer
division was named FACOM .