From the perspective of citizen science, this study aimed to quantitatively clarify the aggregation and distribution of the number of traffic accidents at the macro level by utilizing Open Data on Traffic Accident Statistics, tabulating the number of traffic accidents in Mie Prefecture by municipality, and visualizing the results using opensourceGIS. The results showed that (1) the top five cities, Yokkaichi, Tsu, Suzuka, Ise, and Kuwana, accounted for 67.77% of the total number of traffic accidents in Mie Prefecture. (2) In the extraction of hot spots by kernel density estimation analysis, (4) In the hot spot analysis, areas in the northern part of Mie Prefecture were extracted that are linked to the Ise Bay area from Kisomisaki Town to Ise City due to the influence of the Chukyo area. The most concentrated red hot spot was around National Route 23 with a kernel density estimate of 14.05 in the central part of Tsu City. (3) According to the spatial analysis of the distance from national and regional roads and the accident locations, about 42% of the accidents in Mie Prefecture occurred on national and major regional roads. About 34% of the accidents occurred on roads connecting to national/major regional roads. Furthermore, about 15% of the accidents occurred within 1,000 meters, and about 91% of all accidents occurred within 1,000 meters of a national or major regional road.
