In order to investigate the accuracy of high-energy radiation transport codes based on experimental data, the collaboration; Japanese and American Study of Muon Interaction and Neutron detection (JASMIN), has been formed among many institutions and universities of Japan and U.S.A. A series of experiments have been conducted at the Fermilab Pbar target station, the NuMI beam line and the Fermilab Test Beam Facility (FTBF). In this paper the research activities are reviewed.