  We report on latest results from the Tokai-to-Kamioka experiment studying the
disappearance of $\nu_\mu$ and appearance of $\nu_e$ from neutrino oscillation
with accelerator generated neutrinos. Thanks to increase in statistics and
numerous upgrades to each part of the oscillation analysis, we set the most
sensitive constraints on some of the oscillation parameters, including in
particular the CP-violation angle $\delta_\mathrm{CP}$. Future prospects are
also briefly discussed.
