  We present an overview of a study on precise mass reconstruction and
identification of charged hadrons ($\pi^{\pm}$, $K^{\pm}$, $p$) using
time-of-flight measurements in the electromagnetic calorimeter of a typical
Higgs factory detector. Time-of-flight measurements can take advantage of fast
timing Si sensors with a time resolution in the order of 10 ps. A precise
time-of-flight measurement might contribute to the kaon mass determination and
can improve particle identification in the momentum regions inaccessible for
the $dE/dx$ method. In this contribution, we discuss the current status and the
challenges of the time-of-flight approach for a precise reconstruction of
charged hadron masses.
