I try to give an overview of current kaon physics in light of probing
new physics by the precision measurements. The main topics are (1) CP
violations in K→ππ (ε_K and ε'/ε), (2) CP violation in K→μμ, and (3)
K_L→π0 νν and K+→π+ νν. These channels are interesting and entangling in
light of future precise lattice calculation, and future precision
measurements by LHCb, KOTO and NA62 experiments. Also, these
correlations could distinguish the new physics models.