Based on the forecast data for the mean Feed-In Tariff (FIT) for geothermal energy in Japan, the tariff is projected to increase incrementally from 0.37 USD in 2024 to 0.41 USD in 2028. This reflects a steady upward trend in the values over the period. With the FIT standing at 0.36 USD in 2023, there is a noticeable year-on-year increase, averaging approximately 2.7% annually. A close observation of the yearly increments shows a consistent yearly rise of 0.01 USD from 2024 to 2028. This indicates a compounded annual growth rate (CAGR) of around 2.7% over the five-year period.

Future trends to watch for include:

Government policies and subsidies affecting the renewable energy sector, particularly geothermal energy.
Technological advancements and innovations that might influence the efficiency and costs of geothermal energy production.
Market demand for renewable energy sources, which is expected to grow as Japan continues to transition towards more sustainable energy solutions.