Kei cars are the really small cars that are incredibly popular in Japan.

They must fit into these requirements to be considered a kei class:
Maximum length: 3.4m/11.15ft
Maximum width: 1.48m/4.85ft
Maximum height: 2m/6.56ft
Maximum displacement: 660cc/0.66 liter
Maximum power: 47kw/64PS/63hp

Autozam AZ-1




Daihatsu Copen


and one of my personal favorites, the Suzuki Lapin:


POST MOAR NAO!!!