A web-based work that reports the process of the building and decommissioning of Japan’s commercial nuclear power plants to their decommission. If new plants aren’t built, Japan’s active nuclear plants will become zero in 2049, and decommissioned in 2079. While discussions on nuclear power spark polarizing debates, this work engages a wide range of audience to regard the matter personally, by having one enter the birth year and comparing each other’s life expectancies.