A gas-jet transport system has been installed to the RIKEN GAs-filled Recoil Ion Separator, GARIS to start up SuperHeavy Element (SHE) chemistry. This system is a promising approach for exploring new frontiers in SHE chemistry: background radioactivities from unwanted by-products are suppressed, a high gas-jet transport yield is achieved, and new chemical reactions can be investigated. Useful radioisotopes of 261 Rfa ,b , 262 Db, and 265 Sga ,b for chemical studies were produced in the reactions of 248 Cm(18 O,5n )261 Rfa ,b , 248 Cm(19 F,5n )262 Db, and 248 Cm(22 Ne,5n )265 Sga ,b , respectively. They were successfully extracted to a chemistry laboratory by the gas-jet method. Production and decay properties of 261 Rfa ,b , 262 Db, and 265 Sga ,b were investigated in detail with the rotating wheel apparatus for α- and spontaneous fission spectrometry. Present status and perspectives of the SHE chemistry at GARIS are also briefly presented.