The "Lake Suigetsu 2006 Varved Sediment Core" project, or "Suigetsu Varves 2006" for short, is a multi-national collaborative research project based around the sediment core taken from Lake Suigetsu [soo-ee-get-soo], central Japan, in summer 2006. The project will establish a radiocarbon calibration model for the Late Pleistocene (10,000 – 50,000 BP) based on terrestrial material, free of marine reservoir effects, recovered from annually laminated lacustrine sediment. The project will also produce quantitatively reconstructed climate changes of the monsoon regions for the last 150,000 years using high or ultra-high resolution pollen records. The project will therefore contribute to international scientific endeavour in using radiocarbon-based information to determine timing and rates of environmental changes and to understanding past changes in the global carbon cycle.