SHORT ANSWER: They're only obliged to recycle computers (the actual box) and their monitors. All the rest: you're on your own.
LONG ANSWER: I ran up against this a while back with my till then trusty, albeit rarely used Canon CanoScan 8400F scanner, purchased during a trip to the US (Ingrish manual and bundled software).
Suddenly one day it simply wouldn't scan anymore. It lit up, made all the right noises, and then after a pregnant pause Photoshop Elements (and other similar programs) would deliver up this notice:
No amount of fiddling, unplugging, reinstalling or even connecting to other computers would revive its operation. A call to Canon here eventually got a pleasant young lady on the line who told me that they'd be happy to have a look at my (just out of warranty, wouldn't you know it) scanner, for a mere ¥11,000

, or, just a shade over what it cost me new. Thanks, but no thanks.
Well, eventually I needed a scanner again, and so took a trip over to the big Yodobashi Camera in Shinjuku to buy the next generation of the same thing (CanoScan 8800F).
I thought they would take the old one in exchange for disposal, seeing as how I was buying a new one from them, but was REALLY surprised to hear that, as noted above, they only accept computers and monitors (and, who know?, possibly only CRTs at that).
So, I still have what is essentially an immaculate Canon scanner in a box and all its bits still in their packaging, but with this damned warning message rendering it effectively useless -- unless I care to fork over ¥11k just so it can meet its maker (parts, if any, separate, I'm guessing).
No recycling -- never mind reasonable repair -- of any kind available, it seems.
If anybody here would like to take their chances on reviving the thing (it really was an excellent scanner for the short time it worked), you're certainly welcome to it. Drop a line if you're interested. Otherwise, I guess eventually I'm going to have to dismantle the thing and chuck it out in the trash bit by bit, feeling a bit like a murderer disposing of body parts.
My, times have certainly changed. It's still very much a disposable world now.

, regardless of all the "green" advertising campaigns.
A.