Earlier quoted context omitted.
it's not IOT.
How do you know? There needs to be some kind of connection for remote programmability. The default choice is likely something connected to the (W)LAN. From there, it's only one misconfigured firewall and a default password away from being hacked over the internet.
It let's you control things like temp, intercom to the kitchen and so forth. Automatic Bath one of my favorite things about living in Japan, even more so than the heated toilet seat.