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Recent high-$z$ quasar observations strongly indicate that super-Eddingtonaccretion is a crucial phase to describe the existence of supermassive blackholes (SMBHs) with $M_\mathrm{BH} \gtrsim 10^9 M_\odot$ at $z \gtrsim 7$.Motivated by the theoretical suggestion that the super-Eddington phaseefficiently produces outflows and jets bright in radio bands, we search andfind a super-Eddington radio-loud dust-obscured galaxy (DOG) J1406+0102 at$z=0.236$, through cross-matching of the infrared-bright DOGs of Noboriguchi etal. (2019) with the VLA/FIRST 1.4 GHz radio and the SDSS optical spectralcatalog. DOG J1406+0102 shows broad components in the Balmer lines. Assumingthose lines are from the broad line region, it gives BH mass estimation of$\log\ (M_\mathrm{BH}/M_\odot)=7.30 \pm 0.25$, and AGN luminosity of $\log(L_\mathrm{bol,[OIII]}/\mathrm{erg}~\mathrm{s}^{-1})  = 45.91\pm0.38$ estimated from the intrinsic [OIII] luminosity, resulting insuper-Eddington accretion of $\lambda_\mathrm{Edd}\simeq 3$. We show that 1)DOG J1406+0102 is operating strong AGN feedback: the [OIII] outflow velocityexceeds the escape velocity of the host galaxy halo and the kinetic efficiencyis obtained as $\approx$ 8% that can be sufficient to quench the host galaxy,2) the expected future growth pathway of DOG J1406+0102 would join anover-massive BH trajectory and 3) radio-loud DOGs can provide a significantcontribution to the high-energy ($\gtrsim$ 100 TeV) cosmic neutrino backgroundif we assume DOG J1406+0102 as a representative of radio-loud DOGs.

J1406+0102: Dust Obscured Galaxy Hiding Super Eddington Accretion System with Bright Radio Emission