A review of present experimental status of the K -> pi nu nubar
decays is given in the talk. The NA62 experiment at CERN SPS is
designed to measure the branching ratio of the K+ -> pi+ nu nubar
using a novel kaon decay-in-flight technique, while the KOTO
experiment at JPARC aims to study the KL -> pi0 nu nubar decay.
Both experiments produced new results in 2018. The NA62
experiment observed one candidate event, compatible with the
Standard Model prediction. The KOTO experiment improved the
existing upper limits on the branching ratio of the neutral kaon
decay by an order of magnitude.