I'm a lover of Japanese Kei cars and Kia seemed to have made one themselves. It's called the Ray.
As far as I know, the Ray is currently sold only in Korea. Notice how (awesomely) small the wheels are.
Like the Japanese cars it imitates, the rear door slides like a minivan.
I think Kia should sells these globally - the world needs more efficient, affordable, compact cars that aren't sedans.
Not a fan of the back though.