The Department of Intangible Cultural Heritage considers the manufacture of musical instruments, techniques for their repair, the manufacture of tools necessary for the production of the instruments and repair techniques, as well as the manufacture of materials necessary for these as important restoration techniques to support the traditional performing arts of Japan and has been conducting investigation since 2017. Production of Noh stage costume was investigated for the first time as a technique for preserving the performing arts. In addition, as a report on the current situation regarding the stable securing of raw materials, the reeds of Kanmaki and Udono were included as a topic. The present report is a sequel to “Investigation Report on Techniques for Preserving Cultural Properties with Focus on Musical Instruments 1” and provides an outline of 7 cases of investigation conducted from June to December 2021. 　　Japan, according to the Law for the Protection of Cultural Properties, has a system by which preservation techniques are selected, and holders and holding groups of these techniques are recognized. However, the present investigation has been done on the holders and holding groups that are considered important regardless of selection or recognition. The content of investigation is arranged into the following 7 items and categorized according to instruments for ordering of information: 1. Name of the holder, 2. Date of birth, 3. Address or place of investigation, 4. Date of investigation, 5. Investigator, 6. Outline of the holder of technique, 7. Observation of the investigator. 　　This year, as in the previous year, many conservation techniques for cultural properties were greatly influenced by Covid-19, and the necessity for investigation was felt all the more. However it was not possible to investigate as scheduled due to the prevention of the wide spread of the pandemic. Continuous attention to both the current state of conservation technology and the impact of Covid-19 is needed.