No no, subcompacts are bigger than that. An electric car made to comply with kei car regulations is the Mitshubishi I-miev / Citroen C-Zero, which is 3.50m long and less than 1.50m wide. This compromises the whole car. Having driven it, it doesn't really feel good.

The Zoe is 4m long and about 1.70m wide. That's the same dimensions as the rest of the cars in its segment. This "Ford Fiesta" size is great for European cities, and the cars don't feel compromised on the higher speed roads, as their size and weight makes them more agile than bigger cars, whose only real advantage is space and stability at higher, illegal speeds.