3: Anyone with large feet, broad shoulders or more than 5 feet 10 inches in height, will not fit in most kei cars.
4: Many kei cars made up to the 1980s have two-stroke engines. Those are not for areas where there are strict pollution controls, and most older ones lack oil injection, so you will have to add oil to the gasoline every time you fill up.
5: These cars are great for city driving and small parking spaces, and for experienced drivers, right-hand-drive typically takes about 20 minutes to get accustomed to.
6: In some states, kei trucks are illegal regardless of model year unless they are the Suzuki and Subaru products officially sold in the US, so if you want a Daihatsu Hijet or Midget, a Honda T360, or a Honda Acty 4x4, make sure they are legal in your state.
7: Parts are easiest to get from sources in Canada and Australia, since there is little to nothing available as parts/service in the US unless you are a Subaru 360/Sambar or Honda 600 owner.
8: Expect all kinds of attention, everything from "cute car"/"cool car" to racist or nationalist comments, when driving the car.