Some of the highest precision CNC manufacturing equipment for particular processes is subject to nuclear non-proliferation arms controls as it can be used to ma

Some of the highest precision CNC manufacturing equipment for particular processes is subject to nuclear non-proliferation arms controls as it can be used to make key components in uranium enrichment equipment. So for machines relevant to those laws, a GPS lowjack might be a sensible precaution. North Korea has been picking up this machinery from someone, so I can imagine Japanese industry and government being very paranoid on the issue.