The component analysis of PM_2.5 during the experimental campaign in 2014–2017 in the Nara Basin was conducted to evaluate the impact of fireworks events in Nara the prefecture on the PM_2.5 concentrations. The component analysis revealed that the correlation coefficients of Sr in the PM_2.5 were significantly low during the campaign at the two sites in the Nara Basin of which the concentration variations of PM_2.5 were similar. Meanwhile, the correlation coefficient of the tracer compounds for the fireworks such as Sr, K⁺, Ba, and Cu substantially increased excluding the 4 days when the Sr was particularly high. This result implied that the high Sr concentration days were affected by the fireworks. In addition the Sr/Ti ratio was applicable to determine the day affected by the fireworks events. Furthermore, the contributions from the fireworks events to the PM_2.5 were estimated using the PMF model. The PMF model identified the fireworks factor of which the source profile primarily consisted of the fireworks tracer compounds. The highest contribution from the fireworks factor during the campaign was estimated to be 3.8 µg/m³ during 2017/10/26, accounting for 17.8% of the total PM_2.5 mass. A further study of the hourly PM_2.5 component concentrations is essential, since the release of air pollutants from the fireworks is concentrated in a very short period of time during the day.