A fast-ageing society, high death rate and prevalence of nuclear families in Japan have led to a growing number of itai hoteru in the country where people can check in their dead till the crematorium or cemetery becomes available, according to the Hindustan Times.
Designboom featured a story the other day about the Cemetery of Kamakura Yukinnoshita. Here's another, which it describes as being about a "concrete + wood hall for tree burials to new cemetery in japan". (We don't think they are burying trees).
The forest surrounding Mount Koya (Koyasan) in Wakayama is a sacred mountain and temple complex founded by the monk Kobo Daishi. It is the location of his mausoleum and is surrounded by the Okunoin Cemetery, Japan's largest.