[en] The capability of detachment control in JT-60SC is demonstrated with a divertor code (SOLDOR/NEUT2D). Under the standard operation of the core edge density at 95% of the minor radius, n_edge=3.2x10¹⁹ m^-3, the power flow from the core plasma Q_e=Q_i=6 MW, and the conductance of inner and outer cryopanels C_in=C_out=50 m³/s, the inner divertor plasma is partially detached and the outer divertor plasma attached. The inner divertor can be changed from partially detached to attached plasma by inner pump of 150 m³/s. The fully detached inner divertor is obtained in high density operation with n_sep>4x10¹⁹ m^-3, where n_sep is the density at the separatrix outer midplane, The elastic collision in a dense and cold divertor plasma (n_e≥5x10²⁰ m^-3, T_e<5 eV) play an important role on detachment