La Maison en Petits Cubes

La Maison en Petits Cubes (つみきのいえ, Tsumiki no Ie, lit. "The House of Small Cubes") is a 2008 animated short film created by Kunio Katō, with music by Kenji Kondo and produced by Robot Communications.

Plot
As his town is flooded by water, an aged widower is forced to add additional levels onto his home in order to stay dry. But when he accidentally drops his favorite smoking pipe into the lower submerged levels of his home, his search for the pipe eventually makes him relive scenes from his eventful life (including his time before the flooding began).