The mail weights of domestic scheduled air carriers in Japan are projected to decrease from 34.1 thousand metric tons in 2024 to 18.88 thousand metric tons by 2028. Compared to 2023, when actual mail weights stood at 38.0 thousand metric tons, this reflects a significant downward trend. The year-on-year percentage decrease from 2024 to 2025 is approximately 11.5%, continuing a consistent decline through 2028. The Compound Annual Growth Rate (CAGR) for the period from 2024 to 2028 indicates an average annual decrease of around 14.5%.

Future trends to watch for include:

Technological advancements impacting mail processing and delivery efficiency.
Shifts in consumer behavior towards digital alternatives, reducing physical mail dependency.
Potential policy changes affecting the logistics and air transport sectors.