I literally grabbed a July 2014 week at random and this was the result.
Famitsu Sales: Week 30, 2014 (Jul 21 - Jul 27)
PS4 games would have also of had a much higher physical vs digital ratio in 2014, so in a much better position to chart. Anyway the point isn't to imply that they're on equal footing but simply that weak software showing was very common for PS4 in its first year
It's showing the decrease of software dominate of sony in the Japanese game space.