Just looked it up and it’s exactly what you think it is..
Amazon page for the ‘ScatMat’.
Call it whatever level of safe you want, I don’t agree with it - same with shock collars and fences. If you get a pet and have to condition it with electricity to fit into your lifestyle or problems, that’s a scenario you created (not the pets fault) and then decide to solve it with zap-therapy.
I’m far from a peta pusher, but have been shocked by some of these devices - I’d never subject any of my pets to that.
It's about an hour or so by train from Nagano, then a trek into the woods by foot that's about another 45 minutes or so.
i had some trouble finding a locking lid container in 1 gal size. Maybe you want to try the container store? Or bed bath beyond.
Here's what amazon had: https://www.amazon.com/LOCK-Fridge-Water-70-55-oz-8-5-cup/dp/B0017J8B4U/ref=pd_lpo_vtph_tr_img_1/141-1845128-2280915?_encoding=UTF8&psc=1&refRID=91ZG0336XQFE890DACFD