The Japanese were of minor importance compared to Germany, plain and simple. From a strategic perspective, Japan never posed a credible threat to the Allied side during the entirety of World War II. Despite their initial successes, which made them appear more powerful than they really were, Japan was economically weak and fragile to the core, unable to sustain a protracted war of attrition against Western powers.
Japan suffered from comparatively low industrial production, a chronic lack of resources and raw materials, and a lack of experience when it came to equipment in general. After all, there’s a reason you never hear about the fearsome Japanese tanks or the prowess of Japanese artillery. Both of these existed mostly on paper as they usually didn’t have either.
And the Japanese army? Well, his performance in the fight was disastrous on all fronts. They failed against the Chinese in a year-long war of attrition, the battles on the islands were one-sided slaughter, the Burma campaign was a meat grinder for them, and their first-class army was crushed in Manchuria by the Soviets, in matter of weeks.
The Japanese were strategically harmless, and their war goals were in any case out of reach, while Germany’s were not. Germany was the industrial power of the Axis and it was clear that the war would be won or lost in Europe, not in the Pacific.
Axis coal production. (millions of metric tons)
Axis steel production. (millions of metric tons)
Axis aluminum production. (millions of metric tons)
Shaft Crude Oil Production. (millions of metric tons)
Axis artillery production.
Production of tanks and SPG (Self Propelled Artillery) of the Axis.
Production of Axis military trucks.