Japan has very limited wind energy currently (< 1% of grid generation). Unlike many European countries, Japan is surrounded by deep waters, which makes constru

Japan has very limited wind energy currently (< 1% of grid generation). Unlike many European countries, Japan is surrounded by deep waters, which makes constructing offshore turbines more difficult and expensive. But the recent development of floating wind turbines which can operate in much deeper waters means that may change. However, there is an argument that hydrogen electrolysis is not an efficient use of electricity. By the time you've electrolysed water, transported the H2, and converted it back to electricity in a fuel cell, you've lost at least 70% of the original energy. So unless there is a lot of surplus electricity generation that would otherwise be wasted, it makes more sense to use it directly where possible. Storage technologies (such as chemical batteries, heat batteries) may be more economic than H2 electrolysis/distribution.