Why This Topic Landed in Japan

The counterintuitive claim—that a freezer had been heated to 50°C—was striking enough to spread fast. The temperature was not set directly; attackers remotely kept the defrost (anti-frost) heaters running, and much of the comment thread tried to reconstruct that mechanism. The cyberattack struck on October 11–12, hitting several nationwide chains (named in posts as U and Intermarché), with at least 300 stores affected by spoiled stock and, in some cases, fires. Beyond the spectacle, the episode fed an existing distrust of putting industrial and consumer control gear (IoT/OT) on public networks, which many readers extended to fears about power, gas, and medical systems. A lighter strand compared the attack to games and anime such as Mega Man Battle Network, Detective Conan, and Watch Dogs.

Key Reaction Themes

  • "Don't connect everything to the internet" — By far the most common reaction. Readers questioned why refrigeration gear needs an internet connection at all and argued that closed networks, air-gapping, or manual operation are the safer design.
  • Surprise at the mechanism — From plain astonishment that a freezer could reach 50°C to technical guesses that the defrost heater or heat-exchanger was abused to warm the cabinet.
  • Fear of spillover to critical infrastructure — Worry that power, gas, water, medical devices, self-driving cars, and smart home appliances could be targeted the same way; a smaller group called for harsh punishment.
  • Naming a culprit (a minority) — A few posts speculated about AI or a specific country's involvement, but without evidence.

What Japanese Netizens Are Saying

Cyberattack on French supermarket refrigeration pushes temperatures to 50°C

A cyberattack remotely triggered the defrost function, spoiling food and causing fires; reactions focused on the attack and on networked appliances.

Sources: livedoor News, 2ch

Comments:

  • "This is honestly a life-or-death problem."
  • "Why is a freezer even connected to the internet? Keep the system isolated."
  • "This is baffling too. Hooking a freezer up to the internet is already the world of Watch Dogs."
  • "Seriously, you shouldn't be connecting every single thing to the internet."
  • "It's a problem that, in exchange for convenience, malice gets in more easily too."
  • "I didn't know the defrost heater had that kind of output…"
  • "It's a heat exchanger, so it can both cool and heat."
  • "Being connected makes it easy to manage and you notice anomalies fast—but in exchange you can get hit from the outside."
  • "Honestly, making hacking a capital offense by law might be worth considering."
  • "Please defend electricity, water, and gas at all costs."
  • "What's even the point of putting refrigeration gear on a network…? And being able to control it is scary, isn't it? I'd understand if it were just temperature monitoring, but that's not the case, right?"
  • "This is straight-up IoT terrorism."
  • "Do you really need the internet just to manage fridge temperatures? Couldn't it be handled on a closed network within the supermarket chain?"
  • "Modern air conditioners can be operated remotely, right? If someone cranked a bedridden elderly person's room to 50°C, that would be dangerous."