Originally Posted by jib71
If you want to see the building that marks the start of the "capsule" or "modular" building concept, then you could visit the Nakagin Capsule Tower, which was built in 1972 and is still standing in Ginza - nearest station is Shiodome. It looks very tired now ... in a way that reminds me of a student dorm...:
http://ja.wikipedia.org/wiki/%E4%B8%...83%93%E3%83%AB
Funky! But if I'm reading that right it's not a capsule hotel, but a regular rental-based capsule apartment?

Which explains why, according to the pictures in
this, the rooms are actually much larger than the now-standard coffin-type capsules.
The first of capsule hotel, AFAIK, is Capsule Inn Osaka in Namba, which opened in 1977 and is still the same price -- Y1600. I've stayed there once and hey, for that price, you can't complain!