To a western eye some of these places look like office buildings or small hotels. Or like an airport lounge or small prison or warehouse. Yes they are big but many don't have any architectural style, just concrete.
I think that if some people , or students could arrange a clean up day to help this holy place. Maybe not to completely fix everything but just to sweep and tidy up Oiwa, it would help. Don't forget to bring some foods for the cats.