  Standard lattice calculations in kaon physics are based on the evaluation of
matrix elements of local operators between two single-hadron states or a
single-hadron state and the vacuum. Recent progress in lattice QCD has gone
beyond these standard observables. I will review the status and prospects of
lattice kaon physics with an emphasis on non-leptonic $K\to\pi\pi$ decay and
long-distance processes including $K^0$-$\overline{K^0}$ mixing and rare kaon
decays.
