From the title of this thread...... I want to reply :
"Ab-so -lutly nothin'. Say it agin ya-all. " (Only the old folks might get this .
Yes reduction electrics are VERY common in Japan. Yes, it takes life off the elements.... but that is the "cost of doing business". Compared to building the typical gas kiln........ an electric reduction kiln is cheaper and easier to get inot places you can't get a gas kiln.
Yes they produce the same potential of CO and other byproducts of partial combustion (aldehydes, etc.). You need far better venting than the typical "Orton Kiln Vent" kind of ventilation. They just don't produce it in the same volume or at the same temperature as fuel fired kiln.
Possibilities for fuel include charcoal, wood, propane, butane or natural gas. (DON'T follow the frequent recommendation for using mothballs!!!!!)