Efficiency of kinetic luminosity, η_kin = E_kin/(L_bol,AGNτ), as a function of bolometric AGN luminosity for J1406 together with the AGN sample with wide luminosity range compiled by F. Fiore et al. (2017). The lowest η_kin of J1406 is estimated using ionized gas radius of R = 6 kpc. Cosmological simulation requiring ∼5% of radiation energy couples with ISM (black dashed line) to reproduce observed non-star-forming massive galaxies, and the η_kin of J1406 can exceed or be comparable to this value.