  A recent study from the Horizon Run (HR5) cosmological simulation has
predicted that galaxies with ${\rm log}~M_{\ast}/M_{\odot}\lesssim 10$ in the
cosmic morning ($10\gtrsim z\gtrsim 4$) dominantly have disk-like morphology in
the $\Lambda$CDM universe, which is driven by the tidal torque in the initial
matter fluctuations. For a direct comparison with observation, we identify a
total of about $19,000$ James Webb Space Telescope (JWST) galaxies with ${\rm
log}~M_{\ast}/M_{\odot}>9$ at $z=0.6-8.0$ utilizing deep JWST/NIRCam images of
publicly released fields, including NEP-TDF, NGDEEP, CEERS, COSMOS, UDS, and
SMACS J0723$-$7327. We estimate their stellar masses and photometric redshifts
with the redshift dispersion of $\sigma_{\rm NMAD}=0.009$ and outlier fraction
of only about $6\%$. We classify galaxies into three morphological types,
`disks', `spheroids', and `irregulars', applying the same criteria used in the
HR5 study. The morphological distribution of the JWST galaxies shows that disk
galaxies account for $60-70\%$ at all redshift ranges. However, in the
high-mass regime (${\rm log}~M_{\ast}/M_{\odot}\gtrsim11$), spheroidal
morphology becomes the dominant type. This implies that mass growth of galaxies
is accompanied with morphological transition from disks to spheroids. The
fraction of irregulars is about 20\% or less at all mass and redshifts. All the
trends in the morphology distribution are consistently found in the six JWST
fields. These results are in close agreement with the results from the HR5
simulation, particularly confirming the prevalence of disk galaxies at small
masses in the cosmic morning and noon.
