Prof. Matsumoto has joined as a research member  in the JSPS Core-to-Core Program on “Molecular Recognition Mechanism between Flexible Molecules”. This project consists of Japanese, German and French molecular cluster research teams. The team is coordinated by Prof. Masaaki Fujii (Tokyo Tech., Japan), Prof. Otto Dopfer (TU Berlin, Germany) and Prof. Anne Zehnacker-Rentien (U. Paris-Saclay). We proceed IR spectroscopy of charge resonance aromatic dimers and clusters together with Prof. Otto Dopfer, Berlin.