  We present a calculation of the proton momentum and angular momentum
decompositions using overlap fermions on a $2+1$-flavor RBC/UKQCD domain-wall
lattice at 0.143 fm with a pion mass of 171 MeV which is close to the physical
one. A complete determination of the momentum and angular momentum fractions
carried by up, down, strange and glue inside the proton has been done with
valence pion masses varying from 171 to 391 MeV. We have utilized fast Fourier
transform on the stochastic-sandwich method for connected-insertion parts and
the cluster-decomposition error reduction technique for disconnected-insertion
parts has been used to reduce statistical errors. The full nonperturbative
renormalization and mixing between the quark and glue operators are carried
out. The final results are normalized with the momentum and angular momentum
sum rules and reported at the physical valence pion mass at ${\overline{\rm
{MS}}}\, (\mu = 2\ {\rm{GeV}})$. The renormalized momentum fractions for the
quarks and glue are $\langle x \rangle^q = 0.491(20)(23)$ and $\langle x
\rangle^g = 0.509(20)(23)$, respectively, and the renormalized total angular
momentum fractions for quarks and glue are $2 J^q = 0.539(22)(44)$ and $2 J^g =
0.461(22)(44)$, respectively. The quark spin fraction is $\Sigma =
0.405(25)(37)$ from our previous work and the quark orbital angular momentum
fraction is deduced from $2 L^q = 2 J^q - \Sigma$ to be $0.134(22)(44)$.
