ULTIMATE-Subaru is the next-generation facility instrument program of the Subaru Telescope which will extend the existing Subaru’s wide-field survey capability to the near-infrared (NIR) wavelength. The ULTIMATE-Subaru instrument suite includes Ground-Layer Adaptive Optics (GLAO) and wide-field near-infrared instruments, aiming to provide ~ 0.2 arcsec image size at K band (2.2 micron) over 20 arcmin diameter field of view at the Cassegrain focus. The planned first-light instrument is a Wide-Field Imager (WFI), which covers a 14 x 14 square arcmin field of view in NIR wavelength. The instrument development is led by Subaru/NAOJ in collaboration with ANU, Tohoku University, ASIAA, and the University of Tokyo. The GLAO and WFI are currently in the final and the preliminary design phases, respectively, aiming to conduct the commissioning at the telescope in 2028. In this presentation, an overview of the ULTIMATE-SUBARU instruments, their current status, and future prospects will be presented.
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