The Barcelona Supercomputing Center-Centro Nacional de Supercomputación (BSC-CNS) and the RIKEN Centre for Computational Science (R-CCS), the leadership centre for supercomputing research in Japan, have signed a Memorandum of Understanding (MOU) for Research Collaboration. This MOU is an expression of reciprocal interests in education and research to increase international co-operation between both parties, including the mutual use of the supercomputer Fugaku (RIKEN) and MareNostrum 4 and 5 (BSC).