At low energies, the quark many-body system forms a unique higher-order structure of hadrons and then nuclei, but we have yet to fully understand why it happens based on QCD. Under this situation, it is also difficult to elucidate the high-density matter inside neutron stars.
The J-PARC hadron facility is challenging this grand problem through various experiments on strangeness nuclear physics and intermediate/low energy hadron physics, aiming to solve mysteries of quark confinement and its mass generation, hadron-hadron interactions (nuclear/baryon forces), high-density matter, and so on. In the seminar, the overview and future prospects of these research activities at J-PARC are presented from the experimental point of view.