I edited... I confused by the fact PS4 was launched in Feb in Japan (I counted the weeks from December lol).
Destiny indeed increase sales from sub 7k to over 20k for a week but that was in another moment.
The actual boost you asked:
Media Create Sales: Week 50, 2014 (Dec 08 - Dec 14) 01./00. [3DS] Yo-kai Watch 2: Shin Uchi (Level 5) {2014.12.13} (¥4.968) - 1.244.171 / NEW 02./02. [3DS] Pokemon Omega Ruby / Alpha Sapphire (Pokemon Co.) {2014.11.21} (¥4.937) - 152.384 / 1.950.481 (-11%) 03./00. [PS4] Grand Theft Auto...
www.neogaf.com
15k to 68k.
Grand Theft Auto V PS4 release in Japan.