We experimentally study exotic quantum condensed matter that is attributed by many-body electrons or spins in solids, using macroscopic and microscopic probes and crystal growth. Moreover, we are working on developing a state-of-the-art in situ observation of the electronic states by a combined system of scanning tunnel microscope and molecular beam epitaxy, searching novel materials by fabricating thin films and artificial superlattices of heavy-fermion compounds, and studying quantum interference effect by nano-structure fabrications. Our main target is (1) exotic superconducting states and their superconducting symmetry, (2) heavy-fermion state and their artificial control, (3) non-Fermi liquid behavior and quantum criticality, (4) elemental excitations in quantum liquid system, and so on.