In preparation for the country's 2020 Olympics (and - ostensibly - in order to avoid catastophic numbers of IoT vectored attacks during the Olympic events)... Probably about 5 years too late, though, as the enormity of fixing the problems may be insurmountable even for the Japanese Governmental Security Groups, who are well-known for attention to detail. Regardless there will certainly be an enormous number of surprises and what-not in their targeted bailiwick of connected devices. H/T