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In order to understand the interaction between the central black hole and thewhole galaxy or their co-evolution history along with cosmic time, a completecensus of active galactic nuclei (AGN) is crucial. However, AGNs are oftenmissed in optical, UV and soft X-ray observations since they could be obscuredby gas and dust. A mid-infrared (mid-IR) survey supported by multiwavelengthdata is one of the best ways to find obscured AGN activities because it suffersless from extinction. Previous large IR photometric surveys, e.g., $WISE$ and$Spitzer$, have gaps between the mid-IR filters. Therefore, star forming galaxy(SFG)-AGN diagnostics in the mid-IR were limited. The $AKARI$ satellite has aunique continuous 9-band filter coverage in the near to mid-IR wavelengths. Inthis work, we take advantage of the state-of-the-art spectral energydistribution (SED) modelling software, CIGALE, to find AGNs in mid-IR. We found126 AGNs in the NEP-Wide field with this method. We also investigate the energyreleased from the AGN as a fraction of the total IR luminosity of a galaxy. Wefound that the AGN contribution is larger at higher redshifts for a given IRluminosity. With the upcoming deep IR surveys, e.g., $JWST$, we expect to findmore AGNs with our method.

Extinction-free Census of AGNs in the $AKARI$/IRC North Ecliptic Pole Field from 23-band Infrared Photometry from Space Telescopes