Cumulative distribution curves of merger probabilities of HSC galaxies cross-matched with GAMA (dotted lines) and SDSS (solid lines) predicted by our fine-tuned model, similar to Fig. 8, but separated into different mass bins. The KS test statistic between the most underdense and most overdense environments are also indicated for each subplot, with p-values available if > 0.05. Calculated for a 100 kpc radius aperture, in the following mass bins. 9 < log(M_*) < 9.5 (upper left panel): KS test (SDSS) statistic: 0.432, KS test (GAMA) statistic: 0.263. 9.5 < log(M_*) < 10 (upper right panel): KS test (SDSS) statistic: 0.601, KS test (GAMA) statistic: 0.378. 10 < log(M_*) < 10.5 (lower left panel: KS test (SDSS) statistic: 0.757, KS test (GAMA) statistic: 0.053. 10.5 < log(M_*) < 11 (lower right panel): KS test (SDSS) statistic: 0.064 p-value: 0.430, KS test (GAMA) statistic: 0.192.