For many years, solar power in Japan was discussed mainly as a way to sell electricity . High feed-in tariffs made it relatively easy to calculate returns based on how much power could be sold back to the grid. That situation has changed. Feed-in Tariffs Are Lower, Electricity Prices Are Higher Over time, feed-in tariffs in Japan have steadily declined. At the same time, household electricity prices have increased. This combination has quietly shifted the role of solar power.