4 ms·

This old page makes it look like it was a real product, unclear how it was sold though. Also no product name, oddly... https://web.archive.org/web/201603041714

• numpad0 6y ago
  “臭気発生装置 WA-1型(Odor generation device Type WA-1)” seems to be the name. Listed on Rakuten for about $516 but not sure if it’s in stock or merely listed there. Looks like it works as a wireless slave device for compatible smoke detectors, with one included in the kit.