We (Prof. Matsumoto, Mr. Oyaide, and Mr. Furukawa) visited the laboratory of Prof. Hiroyuki Katsuki at the Nara Advanced Institute of Science and Technology (NAIST) on November 10. We discussed the vibrational strong coupling of gas-phase molecules and clusters, based on the presentation of our research plan. In addition, we had an opportunity for the laboratory tour to see the experimental apparatus for the vibrational polariton in a liquid phase.