This folder contains the data used for Asano, Y., Kawasaki, M., Saito, T., Haraguchi, R., Takatoku, K., Saiki, M., & Kimura, K. (2020). An increase in specific discharge with catchment area implies that bedrock infiltration feeds large rather than small mountain headwater streams. Water Resources Research, 56, e2019WR025658. https://doi.org/10.1029/2019WR025658 Detailed description of data is in the above publication. -Isotope ratios in precipitation and streams -Daily discharge at location D, J and Q