FHI currently produces a 2MW wind turbine, which has been installed at six sites in Japan. This includes the near-shore Kamisu project on Japan's east coast that withstood the magnitude-nine earthquake and contributed vital electricity in the aftermath of the disaster.
Previously, Hitachi has co-operated with FHI on the turbine's development by supplying the turbine's generator and control components.
Hitachi said it plans to expand the wind division once it has been fully integrated. The deal is set to be completed on 1 July.
The FHI 2MW turbine is also set to be used on the plan to develop a floating wind farm off the coast of the Fukushima Prefecture. The project, which includes Hitachi, is headed up by Japanese trading house Marubeni. Nippon Steel Corp and Mitsui Engineering & Shipbuilding are also involved.
In September, Japan’s trade ministry said it was planning a ¥10-20 billion ($130-260 million) project to develop a floating turbine in the deep waters off the northern coast.
Japan hopes to develop a 1GW floating offshore project off its northern coast by 2020. The announcement follows the passing of a renewable-energy bill in the upper house of Japan's parliament.