Ok, Synectics, involved in development and market distribution, ITC is a brand name, but I do believe that the real producer is still ESN. Or maybe I'm wrong, though I don't think so.
p.s. = maybe the Google translater is not very accurate:
"DONIC Bluestorm RSM is a new rubber from DoNIC, Europe's leading brand. The Blue Storm series is Donik's flagship rubber, and a total of five (Z1, Z2, Z3, Z1 Turbo and Big Slam) have been released so far, and the sixth version, the Blue Storm RSM, has been released. However, the new Bluestorm RSM is a different rubber from the previous Bluestorm series. First of all, Bluestorm RSM is a rubber produced by the head of Synonics Group, the official Korean agency. Usually, rubber is developed and produced mainly at the headquarters, but Bluestorm RSM is a rubber produced after close consultation with Donik Germany headquarters led by Synextics Group."