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We present new, near-infrared ($1.1 - 2.4$ $\mu m$) high-contrast imaging ofthe debris disk around HD 15115 with the Subaru Coronagraphic Extreme AdaptiveOptics system (SCExAO) coupled with the Coronagraphic High Angular ResolutionImaging Spectrograph (CHARIS). SCExAO/CHARIS resolves the disk down to $\rho\sim 0.2''$ ($\rm{r_{proj}} \sim 10$ $\rm{au}$), a factor of $\sim 3-5$ smallerthan previous recent studies. We derive a disk position angle of $\rm{PA}$$\sim 279.4^\circ - 280.5^\circ$ and an inclination of $\rm{i}$ $\sim85.3^\circ - 86.2^\circ$. While recent SPHERE/IRDIS imagery of the system couldsuggest a significantly misaligned two ring disk geometry, CHARIS imagery doesnot reveal conclusive evidence for this hypothesis. Moreover, optimizing modelsof both one and two ring geometries using differential evolution, we find thata single ring having a Hong-like scattering phase function matches the dataequally well within the CHARIS field of view ($\rho \lesssim 1''$). The disk'sasymmetry, well-evidenced at larger separations, is also recovered; the westside of the disk appears on average around 0.4 magnitudes brighter across theCHARIS bandpass between $0.25''$ and $1''$. Comparing STIS/50CCD opticalphotometry ($2000-10500$ $\r{A}$) with CHARIS NIR photometry, we find a red(STIS/50CCD$-$CHARIS broadband) color for both sides of the disk throughout the$0.4'' - 1''$ region of overlap, in contrast to the blue color reported atsimilar wavelengths for regions exterior to $\sim 2''$. Further, this color maysuggest a smaller minimum grain size than previously estimated at largerseparations. Finally, we provide constraints on planetary companions, anddiscuss possible mechanisms for the observed inner disk flux asymmetry andcolor.

SCExAO/CHARIS Near-IR Integral Field Spectroscopy of the HD 15115 Debris Disk