I found this gem on the Hobo Moon Cartoons blog site. Why not go over there and find out what else he has? It’s a good one for difficult to find animation.

La Maison en Petits Cubes is a 2008 Japanese animated short subject film created by Kunio Katō, with music by Kenji Kondo and produced by Robot Communications and animated by Oh! Production. It won several prizes, including The Annecy Cristal at the 32nd Annecy International Animated Film Festival and the Academy Award for Best Animated Short Film at the 81st Academy Awards.
It was also included in the Animation Show of Shows in 2008.