Doctor Google tells me that FUKI by that name has been around since 1971...
Is this the model you saw? The FUKI FC-5 ?

From Linkedin page:
https://www.linkedin.com/company/fuki-co.-ltd/about/"Started in Tokyo in 1958 by selling mainly key blanks and was originally called the Goto Corporation.
In 1968, began manufacturing and selling the first key machines in Japan. The name was changed to FUKI in 1971, which comes from the Japanese name for a flower called a butterbur, and is meant to symbolize the company's growth, strength, and long life.
FUKI has expanded rapidly over the years and now manufactures and sell a wide variety of security related products including: key blanks, key machines, locksmith tools, finger print locks, electric locks, exit control systems, card key systems, security cameras, sensor lights, and other security items. Novelty items such as key chains and name tags are also sold.
FUKI now has five main offices in Japan as well as many Key Corner shops in most cities throughout Japan.
Website
http://www.fukilock.com (website appears to be down)
There are some other models for sale on an Japanese Yahoo auction site
https://auctions.yahoo.co.jp/closedsearch/closedsearch/fuki%E3%82%AD%E3%83%BC%E3%83%9E%E3%82%B7%E3%83%B3/0/looks like they may be under a new name, iNAHO
https://fuki4169.com/inahokeykeymachine/index.php I could not find any advertising or user manuals.
cool find, I didn't know about this brand either.
Thanks
Squelchtone