The sound environment performance is often objection or trouble in building. Obviously, these need to be addressed. The Japanese Government’s promotion of wood as a building material has given rise to new construction methods such as CLT panel construction. This has created a new challenge because timber construction buildings tend to have poor sound insulation performance. Another challenge is a review of the Japanese Industrial Standards (JIS) aimed at ensuring compatibility with ISO standards in the methods of measurement and evaluation of the sound insulation performance. We consider indoor noise to be an everyday issue among residents or users of buildings. We study these problems to find solutions and conduct research to clarify the mechanisms of physical phenomena such as sound and vibration. To achieve research objectives that contribute to society, we collaborate with researchers in other fields beyond the field of architectural acoustics environment. Our ultimate goal is to provide acoustic comfort in living environmentsbased on a building’s sound environment performance.