The cardboard dwellings of homeless people in the Shinjuku Station in Tokyo were a 1990s phenomenon. If you go to the website cardboard-house-painting.jp/ about these cardboard houses you can still see some of the beautifull artworks some of the inhabitants made of their temporary shelters. The site is in japanese but if you feel poetic: you can aways count on google translate japanese-english:
Cardboard-type settlement here before the Information Center has to plug in a cardboard reviews too many pieces.
Kita Tokoro had weak instead of reinforcing the new cardboard.
Going to disappear a little bit at a picture of a picture.
This is a collaboration with residents in this.
also a little information can still be found here: http://www.eyedia.com/gallery/paint/street_en.html