I really like these Sandeha - and having lived and worked in the Kent County Lunatic Asylum (latterly known as St Augustine's Hospital) as a student nurse as it was in it's last few years - these sights you've captured are very familiar. Many of the wards were derelict and badly boarded up - the place was quite a bit bigger than the one you visited - several thousand at capacity if I recall correctly, many of whom would find their way back to their old home and sleep rough until discovered and returned to their res. home/ b&b/ Guest house by the sea. A very sad place to be at the time. I was only 19 then so it was long before I got into photography, but I wish I had been. The place is long gone now, only a water tower, entrance hall, church and one of the nurses accommodation blocks remain - all converted into des-reses in a sea of a modern lego-land type housing estate, of course. Now, I know the arguements for the deconstruction of institutional care, and the benefits are manifold, but ... so many of the people I subsequently worked with in the community who had memories of past admissions there said how much they missed peace and feeling of removal from chaos that they experienced by being taken from normality for a while - the true meaning of Asylum. Now-a-days they get stuck in a locked ward, usually several floors up with no fresh air for days on end (of course the windows dont open incase someone throws themselves out), pumped full of life-shortening drugs with side effects the likes of something from a horror film, then discharged with little follow and no hope - and the system wonders why patients spend their life in series of admissions through a revolving door!
see - you got me started now.
Skorj is very much into Urbex as you call it - hopeful he'll chip in with some of his amazing experiences - japan definitely seems to be the place for this kind of thing.