It has a certain 2CV look about it, but apparently it's a Honda test mule, codenamed X170, from 1959. It was the first prototype in Honda's development of four-wheeled production cars.
There doesn't seem to be a lot of information about it, but it had a 360-cc overhead cam V4 engine, air-cooled and with twin carburettors, driving the front wheels. Not many pictures either, but here's a side view.