The first Nissan car, depending on how you define "Nissan," is a bit tricky. Nissan's history is complex due to mergers and name changes.
If you consider the Datson (later Datsun) cars made by the company that eventually became Nissan, the first would be the DAT 4.5hp, which was produced in 1914. However, this was produced by DAT Jidosha Seizo, which would later become Nissan.