For nuclear spectroscopy in the vicinity of N=126 and U-238, we have developed KEK Isotope Separation System (KISS), which is an argon-gas-cell-based laser ion source combined with an on-line isotope separator, installed in the RIKEN Nishina center . The nuclei around N = 126 are produced by multi-nucleon transfer reactions (MNT)  of Xe-136 beam (10.75 MeV/A) impinging upon a Pt-198 target. The KISS facility has a detector station for beta-gamma spectroscopy and a MRTOF system for precise mass measurement. By using these devices, we have successfully performed beta-gamma spectroscopy of Os, Ta , and Re isotopes for the half-life measurements and study of beta-decay schemes, and in-gas-cell laser ionization spectroscopy of Pt, Ir, and Os isotopes for evaluating the magnetic moments and the trend of the charge-radii (deformation parameters).
In the presentation, we will report the present status of KISS, experimental results of nuclear spectroscopy in the heavy region, and future plan of KISS activities.
 Y. Hirayama et al., Nucl. Instrum. Methods B 353 (2015) 4.; B 463 (2020) 425.
 Y.X. Watanabe et al., Phys. Rev. Lett. 115 (2015) 172503.
 P. Walker et al., Phys. Rev. Lett 125 (2020) 192505.