J1 is particularly common in mountainous regions of Europe (with the notable exception of the Alps and the Carpathians), like Caucasus, Greece, Albania, Italy, central France, and the most rugged parts of Iberia.
J1 secara khusus umumnya ditemukan di daerah pengunungan di Eropa (dengan pengecualian yang nyata pada Alpen dan Karpathia), seperti di Kaukasus, Yunani, Albania, Italia, Prancis tengah, dan daerah-daerah paling terjal di Iberia.