Industrial Engineers are the unsung heroes that make our standard of living possible.   Great video.
 It just amazes me, the people who build these machines and actually put them together and how smart and mechanically inclined they are. INCREDIBLE!!!!  
For those who don't know, Japan is SERIOUS about recycling. Residents needs to properly sort their recycling into MANY different categories (i.e ferric metals, non-ferric metals, glass, PET bottles etc) often need to be treated prior (i.e labels and caps removed from PET bottles and washed) and are put out in specific days. All this means when it arrives at the recycling plant, it arrives all pre-sorted and ready for processing.
From what I've heard, there's a LOT of cost involved with sorting mixed recyclables, and apparently in countries that use mixed recycling, a lot of it just gets burned due to said cost. This is probably why recently, a lot of PET bottles in Japan now have "made from 100% recycle PET" on them. It's not financially-prohibitive to do this, as there's a plentiful source of recycled PET available.
 That was quite impressive! It's amazing just how smart these people are who come up with the machinery that does this. Respect is in order here!