The forecast for broccoli and cauliflower yield in Japan shows a decreasing trend from 2024 to 2028, with yields declining gradually year-on-year. Specifically, the yield is expected to drop from 101.49 in 2024 to 99.6 by 2028. This represents a consistent annual reduction in yield, indicative of potential challenges in production efficiency or environmental factors affecting crop growth. The variation in percentage over the last two years is not provided but is suggested by this described trend.

Future trends to watch for include:

Impact of climate change on crop yield and growing conditions.
Technological advancements in agriculture that could potentially reverse the decline in yield.
Government policies and support for sustainable farming practices.
Market demand fluctuations that might influence cultivation priorities.