Complex sentence: On 1 July 2012, new energy tariffs set by the Japanese government began that pay ¥42 a kwh over the next 20 years to solar power producers, among the highest in the world.
Split into simpler sentences: On 1 July 2012, new energy tariffs were introduced by the Japanese government. Tariffs, set at ¥42 per kWh over the next 20 years to solar power producers, are among the highest in the world.