Recent results on a search for the decay KL->pi0 nu nubar by KEK E391a
at the 12-GeV PS is presented. This decay is a flavor changing neutral
current process and is caused by direct CP violation. The branching
ratio is predicted to be (2.76+-0.40) x 10-11. No candidate events
were found. An upper limit on the branching ratio for the decay was
set to be 6.7x10-8 at the 90% confidence level. This search will be
continued with modified E391a detector at J-PARC by E14.Present status
of E14 is also presented