(a) The color excess (E(B − V)*), (b) stellar mass, (c) SFR, (d) IR luminosity contributed from AGNs, (e) total IR luminosity, (f) radio spectral index (αradio), and (g) qIR of HSC–FIRST RGs as a function of redshift. The color code is i-band magnitude. The histograms show the SDSS-level (blue), HSC-level (red), and total (black) objects. The dashed lines are mean values of each quantity for SDSS-level (blue) and HSC-level (red) objects. 835 RGs are plotted in panels (a) to (e) while 190 RGs with FIRST and TGSS data are plotted in panels (f) and (g).