Optically Adaptive System for Imaging Spectroscopy (OASIS) 3D data of the Canada-France-Hawaii Telescope in the central 10''.48''.3 (2.92.3 kpc2) region of the Seyfert 2 galaxy NGC 1358 were analyzed. Emission line maps for H at 6563 Å and H at 4861 Å were obtained from the OASIS spectra in the 4800-5500 and 6220-6990 Å wavelength regions. Density distribution, as indicated by the H/H flux ratio, is 105.5 cm3 at the center and 104.4-106.0 cm3 surrounding the center. An elliptical region with a density of 105.5-105.8 cm-3 (perpendicular to the bar's position angle, PA) was discovered at symmetrical locations approximately 1.2-2.0 arcsec and 1.1-1.9 arcsec south east (SE) and north west (NW), respectively, of the center along the bar (PA=130o) axis. A lower-density region (appearing as a void) also existed between the center and this symmetrical structure. The high F(H)/F(H) flux ratio values and the distribution of line widths suggest a region with high-density neutral hydrogen gas. The H flux image and linewidth, and F(H)/F(H) flux ratio image maps suggest presence of a substructure associated with a supermassive black hole at the galactic center, as well as independent structures with relatively strong fluxes in the SE and NW regions. The SE structure is delineated as one substantial substructure, whereas the NW substructure appears broken, or is potentially two separate structures, due to dust shielding. The regions have an independent boundary layer with a density exceeding 106.0cm3 toward the center, likely resulting from collision of the structure flowing along the bar with the Inner Lindblad resonance zone.