Kaonic nuclei are important systems to investigate the KbarN interaction, even though their existences have not been established experimentally so far.
We are carrying out an experimental search for so-called K-pp bound state, which is theoretically predicted as the lightest kaonic nucleus, by the 3He(K-,n) reaction at 1 GeV/c (J-PARC E15).
The first physics data taking was performed in May 2013 with ~5*10^9 kaons on 3He target, corresponding to a ~1% of the original proposal.
A new spectrometer system at K1.8BR experimental area worked well as expected, and we successfully obtained the 3He(K-,n)X missing-mass spectrum at forward angle with a ~10 MeV/c^2 resolution (sigma) around the K-pp binding threshold.
In this talk, the latest results of the semi-inclusive 3He(K-,n) and the exclusive 3He(K-,Lp)n analyses will be discussed.