Final answer:
Japan's industrial capacity stagnated and declined during the early 20th century.
Step-by-step explanation:
An accurate statement about Japan during the early decades of the twentieth century is that its industrial capacity stagnated and then declined.
During this time, Japan experienced a slowdown in economic growth and faced challenges in maintaining its industrial output. This was due to various factors such as the Great Depression, resource constraints, and competition from other emerging Asian powers.
This decline in industrial capacity constrained Japan's ability to assert its influence as a major power during this period.
Learn more about Japan's industrial capacity in the early 20th century