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We searched for diffuse interstellar bands (DIBs) in the 0.91$<\lambda<$1.33$\mu$m region by analyzing the near-infrared (NIR) high-resolution ($R=20,000$and 28,000) spectra of 31 reddened early-type stars ($0.04<E(B-V)<4.58$) and anunreddened reference star. The spectra were collected using the WINEREDspectrograph, which was mounted on the 1.3 m Araki telescope at KoyamaAstronomical Observatory, Japan, in 2012--2016, and on the 3.58 m NewTechnology Telescope at La Silla Observatory, Chile, in 2017--2018. We detected54 DIBs -- 25 of which are newly detected by this study -- eight DIBcandidates. Using this updated list, the DIB distributions over a widewavelength range from optical to NIR are investigated. The FWHM values of theNIR DIBs are found to be narrower than those of the optical DIBs on average,which suggests that the DIBs at longer wavelengths tend to be caused by largermolecules. Assuming that the larger carriers are responsible for the DIBs atlonger wavelengths and have the larger oscillator strengths, we found that thetotal column densities of the DIB carriers tend to decrease with increasing DIBwavelength. The candidate molecules and ions for the NIR DIBs are alsodiscussed.

Survey of near-infrared diffuse interstellar bands in $Y$ and $J$ bands. I. Newly identified bands