The Abukuma Mountains, a major granitic terrain in Japan, formed as an uplifted peneplain. (a) Location of the study area. (b) Digital elevation map of the sampling sites. (c) Close-up of the catchments. Elevation data is obtained from ASTER GDEM (http://gdem.ersdac.jspacesystems.or.jp/). Black dots indicate the sampling sites for depth profiles. Open squares indicate the sampling sites for fluvial sediments. Catchments of the sites are also indicated as solid lines. Numbers described are denudation rates (mm/kyr) obtained from this study.