Results of the Measurement of Depth Distribution of Radioactive Substances in Soil in 2 km×2 km Grids Southwest of Fukushima City (Decay correction: June 14, 2011) Results of the Measurement of Depth Distribution of Radioactive Substances in Soil in 2 km×2 km Grids Southwest of Fukushima City (Decay correction: June 14, 2011)