This study examines the weekly running event "parkrun," which combines elements of both exercise and social interaction, focusing on a comparison of venue attributes and participation patterns between parkrun-developed countries and Japan, as well as an analysis of the characteristics and participation patterns at parkrun venues within Japan. The international comparison revealed that, despite being concentrated in densely populated areas, Japanese parkrun venues have a lower average number of participants, feature courses with multiple laps, and have a higher proportion of impermeable surfaces. The domestic analysis highlighted significant differences among venues, with notable participation from women and foreign tourists. Additionally, the analysis identified that, besides population, the length of a single lap is especially related to the average number of participants.