The Publica Sports was a concept car that was developed from the Publica production car.
The first public viewing was at the 1962 Tokyo Motor Show.It featured just 2 seats, a small but high revving engine and a sliding canopy for entry.
The Publica used a 2 cylinder boxer engine, so the Publica Sports is likely to have used the same engine.
It was further developed into the production Sports 800 but without the sliding canopy.