README East Asian Monsoon behaviour reflected in the stable isotope hydrology of Lake Suigetsu and surrounding catchment, Japan ACCOMPANYING DATA (ver. 28 Apr. 2023) Dataset Creators: Charlie REX (1), Jonathan TYLER, Kazuyoshi NAGAYA, Richard STAFF, Melanie LENG, Keitaro YAMADA, Ikuko KITABA, Junko KITAGAWA, Hideaki KOJIMA, Takeshi NAKAGAWA (1) Scottish Universities Environmental Research Centre (SUERC), Scottish Enterprise Technology Park, Rankine Avenue, Glasgow, G75 0QF, UK E-mail: c.rex.1@research.gla.ac.uk Methods provided in Rex et al. (2023) Coordinates corresponding to location codes are given in Rex et al. (2023) Supplemental Information Sheet 1 provides sampling information and corrected isotope composition of samples from the Five Lakes of Mikata catchment. Accompanying weather data is also provided, as well as sampling notes and observations. Data includes lake/river water samples, precipitation samples, and samples from the Lake Suigetsu water column. Sheet 2 provides water chemistry variations with depth for Lake Suigetsu across six days within the observation period. Both temperature and salinity data are included.