TOKYO — GDH Capital, a member of the GDH Group, has launched a ¥650 million ($5.5 million) investment fund to develop content across a range of media, including music, TV, mobile and feature pics.The main target will be small to medium companies. GDH has previously launched special-purpose companies and, earlier this year, an entertainment contents fund. But this is first time it will go outside the group to fund content creators. The aim is to nurture companies expected to generate new demand in the years to come, while synergizing their activities with GDH’s businesses. NIF SMBC Ventures, a Tokyo-based private equity firm, will also provide startup coin and advice to the fund, though the exact amount has not been revealed.