The Zero Yen Project involved building dwellings after the Fukushima Daiichi nuclear power plant meltdowns following the March 2011 earthquake and subsequent tsunami that devastated the Tohuku region. In response to the disaster he created a suicide help line using his personal cell phone. Later he studied provisional dwellings made from scrap wood, discarded cardboard boxes and other scavenged materials. In 2004 is photographic book "Zero Yen House" was published.