  The Charged-Current Quasi-Elastic (CCQE) interaction, $\nu_{l} + n
\rightarrow l^{-} + p$, is the dominant CC process at $E_\nu \sim 1$ GeV and
contributes to the signal in accelerator-based long-baseline neutrino
oscillation experiments operating at intermediate neutrino energies. This paper
reports a measurement by the T2K experiment of the $\nu_{\mu}$ CCQE cross
section on a carbon target with the off-axis detector based on the observed
distribution of muon momentum ($p_\mu$) and angle with respect to the incident
neutrino beam ($\theta_\mu$). The flux-integrated CCQE cross section was
measured to be $(0.83 \pm 0.12) \times 10^{-38}\textrm{ cm}^{2}$ in good
agreement with NEUT MC value of ${0.88 \times 10^{-38}} \textrm{ cm}^{2}$. The
energy dependence of the CCQE cross section is also reported. The axial mass,
$M_A^{QE}$, of the dipole axial form factor was extracted assuming the
Smith-Moniz CCQE model with a relativistic Fermi gas nuclear model. Using the
absolute (shape-only) $p_{\mu}cos\theta_\mu$ distribution, the effective
$M_A^{QE}$ parameter was measured to be ${1.26^{+0.21}_{-0.18} \textrm{
GeV}/c^{2}}$ (${1.43^{+0.28}_{-0.22} \textrm{ GeV}/c^{2}}$).
