June 2019 is the 65th month of the PlayStation 4 being on sale in Japan. The gap grew in favor of the PlayStation 3 by 84,695 units in the last month and in favor of the PlayStation 3 by 181,584 units in the last 12 months. The PlayStation 4 currently leads by just 127,850 units.
The PlayStation 3 launched in November 2006, while the PlayStation 4 launched in February 2014. The PlayStation 4 has sold 8.21 million units, while its predecessor the PlayStation 3 sold 8.07 million units.