The Great East Japan Earthquake in 2011 caused unprecedented damage. During this time, several nonprofit organizations conducted voluntary emergency support activities in damaged areas. Although there was a magnificent giving, donations to nonprofit organizations’ disaster relief funds still seemed to be low. As streams of donations are very complex, people cannot acquire enough information about their donations’ use by nonprofit organizations. Moreover, a primary method for grasping the framework or streams of donations has not yet been clearly determined. To examine these problems, we aim to aggregate the flow of disaster relief funds by constructing a matrix model of the inflows and outflows of relief funds at various disaster support organizations. Throughout this process, we discuss statistical methods for accounting for the various relief fund streams. Using this matrix model, we found that donations given by people amounted to over 675 billion yen (8.4 billion U.S. dollars), and each had a different stream leading to final use.
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