The first Skyline GT-R, known by the internal Nissan designation PGC10, was released on 4 February 1969, and was exclusive to Japanese Nissan dealership network called Nissan Prince Store when the Prince company was integrated into Nissan operations in 1966. It was available originally as a four-door sedan after a public debut at the October 1968 Tokyo Motor Show. It was advertised alongside the Nissan R380 racecar to showcase the Skyline’s racing heraldry. It was equipped with the 2.0 L DOHC S20 I6 producing 160 hp (120 kW) at 7000 rpm and 177 N·m (131 ft·lbf) of torque at 5600 rpm. Power was delivered to the rear wheels by a 5-speed manual transmission. The first Skyline GT-R rode on a semi-trailing arm strut suspension. It was available as a coupe in March 1971 with the chassis code KPGC10.
A popular name for the PGC and KPGC10 Skyline GT-R was “Hakosuka,” which combines the Japanese word for box (“hako” or ハコ) and the pronounced abbreviation of skyline (“Suka” or スカ as in スカイライン or “sukairain”).