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We report the initial result of an adaptive-optics assisted, opticalintegral-field-unit observation on IRAS04576+0912, the nearest (z=0.039) activegalactic nucleus with a prominent blueshift/tail in [O III] emission from asample of such objects that we have collected from the literature. We aim ataddressing the putative quasar-mode feedback process with Subaru/Kyoto 3DII+AO188. The optical waveband (6400--7500 AA) enables us to measure the gasdensity via the [S II] doublets, in contrast to earlier Near-IR studies. Sincethe fast [O III] outflow happens only around rapidly growing central blackholes, this object is suitable for investigating the black hole-galaxycoevolution. The obtained data cube exhibits blue tail in the [S II] emissionat many lenslets. By fitting the spectrum with the high excess flux at the [SII] blue tail, we find the fast (~ 860 km/s), dense (>3000/cc), wide-angle andoffset outflow in central 100-pc scales. Although the large opening angle andthe high gas outflow-to-accretion ratio may favour the feedback hypothesis, theinferred kinetic power injection rate of this ionized gas outflow seemsinsufficient to influence the whole host galaxy. A conventional assumption of alow density must have overestimated the feedback process.

A 100-pc Scale, Fast and Dense Outflow in Narrow-Line Seyfert 1 Galaxy IRAS04576+0912