The Department of Intangible Cultural Heritage recognizes the manufacture of musical instruments and techniques for their repair, the manufacture of tools necessary for the production of the instruments and techniques for their repair, and the manufacture of materials necessary for the above as important restoration techniques for supporting Japan’s traditional performing arts, and an investigation on these techniques has been ongoing since 2017. This report is a follow-up to the “Investigation Report on Techniques for Preserving Cultural Properties with a Focus on Musical Instruments 6” and outlines seven cases of investigations conducted from August to December 2023. Pursuant to the Law for the Protection of Cultural Properties, Japan has a system for selecting preservation techniques and identifying holders and holding groups of these techniques. However, the said investigation focuses on holders and holding groups considered important regardless of their selection or recognition status. For each instrument, the investigation is conducted according to the following seven items, in this order: 1. Name of the holder of the technique, 2. Date of birth of the holder, 3. Address or place of investigation, 4. Date of investigation, 5. Investigator, 6. Overview of the holder, and 7. Observations of the investigator. On May 8, 2023, COVID-19 was reclassified from the category for new types of influenza and other infectious diseases (Category 2) to Category 5 of infectious diseases, and support measures that were implemented against COVID-19 were accordingly discontinued. However, it cannot be said that techniques for preserving cultural properties have returned to the state they were in before COVID-19, or that the dissemination of new techniques for the “with COVID-19 era” is progressing. Going forward, we will continue to closely monitor the trends in techniques for preserving cultural properties in conjunction with the restoration of traditional performing arts supported by musical instruments.