The Ministry of Health, Labor, and Welfare of Japan have suggested local governments establish Health, Medical, and Welfare Coordination Headquarters at the time of disaster. Gathering and processing information is one of the key functions of the headquarters. The study aims to clarify the required functions of information for the headquarters.

A series of interview surveys and observations were conducted, including for local governments and experts in disaster response. The contents were analyzed and required standard functions and procedures had been extracted.

The most important aspect of information gathering is its use in decision-making in matching needs and demands with resources. Needs and demands are based on damage and situation of the casualties. Resources can be categorized into human, material, financial, and informational. Because the headquarters have to process much information, it is important to clarify the objective and strategy of disaster response. The headquarters gather various quantitative and qualitative information using information and communication technology, telephone, meeting and other methods. Qualitative information can be categorized as: expected, surprising (unexpected), and unusual (rare) contents. For expected contents, quantification or estimation of needs from information in normal time or limited information immediately after the disaster and displaying or further analyzing by geographic information systems is useful. By surprising contents or case reports, additional responses or strategies will need to be reviewed.

The procedure, including information gathering and decision-making, follows the OODA (observe, orient, decide, act) loop. According to our mail survey of all 47 prefectural local governments in 2019, 89% were planning to establish the headquarters. However, only 36% had prepared a manual. Using the results of this study, a standard strategic manual for the operations of the headquarters is being developed and brushed up.