Japanese companies will still own more than 50 per cent of TMC, as Toshiba will reinvest ¥350.5bn and optics firm Hoya will put in ¥27bn. Korean semiconductor firm SK Hynix has also bought a ¥395bn stake, but will be "firewalled" from accessing proprietary information and will be banned from owning more than 15 per cent of the voting rights for 10 years.