In 2023, Japan's road density was close to 337.87 kilometers per hundred square kilometers. Forecasted data indicates a slight increase in road density from 2024 to 2028, with an annual growth rate stabilizing. The year-on-year variation shows minimal growth, reflecting a steady but modest expansion in infrastructure development. The Compound Annual Growth Rate (CAGR) for the period 2024 to 2028 stands at approximately 0.2%, suggesting a stable, low growth rate over five years.

Future trends to watch for include:

Technological advancements in road construction and materials that could improve road density efficiency.
Possible governmental policy changes and infrastructure investments impacting future road density.
Environmental regulations that might influence the expansion of road networks.