The renewable energy sector plays a key part in Japan's growth strategy. Among options such as solar and geothermal, wind power may be the most suitable for Japan as it is surrounded by the ocean.
Winds are strong and stable at the ocean due to the absence of structures blocking the wind. The noise and vibrations from wind turbines disturbing residents is another reason the ocean is preferable.
The challenge is that the ocean floor around Japan is steep, so it would only make sense if wind turbines float. But there are no floating offshore wind farms in the world.