In 2023, the yield of squash, gourds, and pumpkins in Japan stood at 104.26 thousand hectograms per hectare. The forecasted yield data from 2024 to 2028 shows a consistent declining trend. The year-on-year percentage change shows a declining trend of approximately -1.56% in 2024 to 2025, -1.54% from 2025 to 2026, -1.54% from 2026 to 2027, and -1.54% from 2027 to 2028. The Compound Annual Growth Rate (CAGR) over the period from 2024 to 2028 indicates an average annual decrease of around -1.54%.

Future trends to watch for include:

Impact of climate change on yield reduction.
Technological advancements in agriculture that may increase efficiency and output.
Changing consumer preferences which might influence demand and subsequently the focus on yield improvements.
Government policies aimed at boosting crop yields and efficiency.