Why Kei Cars were built ?
Kei cars were developed in post-World War II Japan
to encourage vehicle ownership and support the rebuilding of the automotive industry. The Japanese government created the kei car category with tax breaks and incentives to make small, affordable cars accessible to a wider population, who had previously relied on motorcycles or bicycles for transportation.
Here's a more detailed breakdown:
- Post-War Rebuilding:
Japan was rebuilding after World War II, and the government sought to stimulate economic growth, including the automotive industry.
- Affordability:
Full-sized cars were expensive, so the kei car category was created to provide a more affordable alternative for transportation. 
- Incentives:
Tax breaks and other incentives made kei cars cheaper to buy, insure, and maintain.
- Specific Requirements:
Kei cars were defined by specific dimensions and engine size limits, initially 150cc for four-stroke engines (100cc for two-strokes), which were later increased.
- Urban Suitability:
Kei cars' compact size and ease of parking made them well-suited for Japan's crowded cities and narrow streets.