In Japan, a super compact car is done a standard of and is called 'Kei'.
'Kei' means 'light'.
・Body size (upper limit)
overall length, 3400mm
overall width, 1480mm
overall height, 2000mm
・Engine displacement (upper limit)
660cc
This small size is a very match in Japanese motorization.
And body type is full line-up, of course there is the truck.
The popular name of the truck is 'Kei-tora'.
Seemingly it resembles 'Dodge A100 Truck' and 'Ford Econoline truck', but is very small.
Kawasaki Z750FX with '98 MAZDA SCRUM TRUCK
Owner's blog 'The Twentieth Century Boy'
http://blogs.yahoo.co.jp/thetwentieth_centuryboy