Honestly, this is very annoying for me as I use an incandescent bulb to keep my well pump just above freezing during the winter months. It’s going to be a huge pain finding a low power heater as a replacement. Most of what I’m finding are made for submersible use for things like fish tanks and burn up if not used underwater.
https://www.theguardian.com/world/2018/nov/15/japan-cyber-security-ministernever-used-computer-yoshitaka-sakurada
I think this article is enlightening on Japan’s cybersecurity. Things may have changed but people like this being in charge put them way behind.