Strangeness nuclear physics is one of the main fields to be explored at the J-PARC Hadron Hall. The K − and π ^± beams at the K1.8 beam line will be used mostly for hypernuclear experiments. The γ-spectroscopy of Λ hypernuclei using the K −,π − reaction and the spectroscopy of neutron-rich hypernuclei via the π −,K ⁺ reaction are planned to be studied. As for Strangeness = − 2 systems, experiments for Ξ hypernuclear spectroscopy via the K −,K ⁺ reaction, double Λ hypernuclei by the hybrid emulsion method, and Ξ⁻-atomic X rays will be carried out.