Recent Results and Future Prospects of Kaonic Nuclei at J-PARC

$${\bar{K}}$$ -nuclear bound systems, kaonic nuclei, have been widely discussed as products of the strongly attractive $${\bar{K}} N$$ interaction in $$I = 0$$ channels. Recently, we demonstrated that kaonic nuclei can be produced via in-flight $$(K^-,N)$$ reactions using the low-momentum DC kaon beam at the J-PARC E15 experiment. We observed the simplest kaonic nuclei, $$K^-pp$$ , having a much deeper binding energy than normal nuclei. For further studies, we have proposed a series of experimental programs for the systematic investigation of light kaonic nuclei, from $${\bar{K}} N$$ ( $$\Lambda (1405)$$ ) to $${\bar{K}} NNNN$$ . In the new experiment approved as J-PARC E80, we will measure the $${\bar{K}} NNN$$ ( $$A=3$$ ) system as a first step toward a comprehensive study.