This study aims a better understanding of the radiocesium leaching through stemflow and branchflow following the Fukushima Dai-ichi Nuclear Power Plant accident. Spatial variability of radiocesium leaching was monitored in a coniferous forest (Cryptomeria japonica, young Japanese cedar stands) and a mixed deciduous broadleaved forest (Quercus serrata, Japanese oak stands). Branchflow collectors were installed at canopy layers (live branches, mixed of live and dead branches, and dead branches) while stemflow collectors were installed at tree trunk (upper: 1 m below canopy layer and lower: 1.3 m from forest floor). The preliminary results displayed radiocesium leaching (Cs-137 concentration) was greater for branchflow that received washoff and leachate from the dead branch than the branchflow receiving radiocesium inputs from mixed and young branches. For the tree trunk, radiocesium leached more in stemflow from the lower part as compared to the upper part.