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We present CO(3-2) emission observations toward the 3'x3' (or 20x20kpc at adistance of 23Mpc) region of the southern barred spiral galaxy NGC 986 usingthe Atacama Submillimeter Telescope Experiment (ASTE). This effort is a part ofour on-going extragalactic CO(3-2) imaging project ADIoS (ASTE Dense gasImaging of Spiral galaxies). Our CO(3-2) image revealed the presence of a large(the major axis is 14 kpc in total length) gaseous bar filled with densemolecular medium along the dark lanes observed in optical images. This is thelargest ``dense-gas rich bar'' known to date. The dense gas bar discovered inNGC 986 could be a huge reservoir of possible ``fuel'' for future starbursts inthe central region, and we suggest that the star formation in the centralregion of NGC 986 could still be in a growing phase. We found a good spatialcoincidence between the overall distributions of dense molecular gas traced byCO(3-2) and the massive star formation depicted by H$\alpha$. The globalCO(3-2) luminosity $L'_{\rm CO(3-2)}$ of NGC 986 was determined to be $(5.4 \pm1.1) \times 10^8$ K km s$^{-1}$ pc$^2$. The CO(3-2)/CO(1-0) integratedintensity ratio was found to be 0.60 +/- 0.13 at a spatial resolution of 44''or 5 kpc, and a CO(3-2)/CO(2-1) ratio was 0.67 +/- 0.14 at a beam size of ~25''or ~2.8 kpc. These line ratios suggest moderate excitation conditions of COlines ($n_{\rm H_2} \sim 10^{3-4}$ cm$^{-3}$) in the central a few kpc regionof NGC 986.

ASTE CO(3--2) Observations of the Southern Barred Spiral Galaxy NGC 986: a Large Gaseous Bar Filled with Dense Molecular Medium