During earthquake disasters, medical facilities and other medical facilities are damaged, and the medical functions in the region are reduced. On the other hand, injuries and loss of medical supplies due to the disaster increase the medical needs. Therefore, it is necessary to respond to diverse medical needs and effectively utilize limited medical resources during earthquake disasters. In particular, delays in medical care for the patients with intractable diseases living under home care who regularly use medical devices such as tube feedings and ventilators lead to the endangerment of their lives. It has been reported that past large-scale earthquake disasters in Japan have also caused problems such as prompt admission of the patients with intractable diseases living under home care to medical facilities and information management of the patients. As a countermeasure for the patients, the listing of the patients with intractable diseases on the list of persons requiring support for evacuation is being promoted, but only about 60% of local governments in Japan are doing so, and many local governments are unable to examine the patients with intractable diseases in the region. Therefore, it is necessary to comprehensively examine the patients with intractable diseases living under home care in the region and improve the medical support system for the patients with intractable diseases during disasters. Therefore, the purpose of this study is to comprehensively examine the patients with intractable diseases living under home care in the region using the National Health Insurance data, which is medical big data. Patients receiving home medical care were selected from medical information in the National Health Insurance data for Hakui, Ishikawa, a regional city in Japan. As a result, it was possible to comprehensively examine the number of the patients with intractable diseases living under home care who should be cared for during disasters in Hakui, Ishikawa Prefecture.