  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 an
unreddened reference star. The spectra were collected using the WINERED
spectrograph, which was mounted on the 1.3 m Araki telescope at Koyama
Astronomical Observatory, Japan, in 2012--2016, and on the 3.58 m New
Technology Telescope at La Silla Observatory, Chile, in 2017--2018. We detected
54 DIBs -- 25 of which are newly detected by this study -- eight DIB
candidates. Using this updated list, the DIB distributions over a wide
wavelength range from optical to NIR are investigated. The FWHM values of the
NIR 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 larger
molecules. Assuming that the larger carriers are responsible for the DIBs at
longer wavelengths and have the larger oscillator strengths, we found that the
total column densities of the DIB carriers tend to decrease with increasing DIB
wavelength. The candidate molecules and ions for the NIR DIBs are also
discussed.
