  This study conducted an analysis of muons, protons, and charged pions emitted
from $\nu_{\mu}$ charged-current interactions on iron using a nuclear emulsion
detector. The emulsion detector with a 65$\,$kg iron target was exposed to a
neutrino beam corresponding to 4.0$\times$10$^{19}$ protons on target with a
mean neutrino energy of 1.49$\,$GeV. The measurements were performed at a
momentum threshold of 200 (50)$\,$MeV/$c$ for protons (pions), which are the
lowest momentum thresholds attempted up to now. The measured quantities are the
multiplicities, emission angles, and momenta of the muons, protons, and charged
pions. In addition to these inclusive measurements, exclusive measurements such
as the muon-proton emission-angle correlations of specific channels and the
opening angle between the protons of CC0$\pi$2$p$ events were performed. The
data were compared to Monte Carlo (MC) predictions and some significant
differences were observed. The results of the study demonstrate the capability
of detailed measurements of neutrino-nucleus interactions using a nuclear
emulsion detector to improve neutrino interaction models.
