The Prince BNS-J was a prototype that was displayed at the 1956 Tokyo Motor Show. The car was very large in comparison to other Japanese cars of the era and was the first ever non-production prototype ever to be shown at the Tokyo Motor Show.

The car was powered by a 1484cc FG4A-20 Prince engine that had been increased to approximately 1900cc, similar to what Prince would later fit to the Skyline and Gloria 4 years later. The car never entered production.