Marvelous made a special price cut on the Senran Kagura: Estival Versus Sakura Edition PlayStation 4 game in Japan.
From January 18, 2017 until February 15, 2017 you can buy the game from the Japan PSN with 40% OFF.

It means the game at the moment costs only 2988 Yen (with tax) instead of 4980 Yen (with tax). Here is the PlayStation Store Page Link: https://store.playstation.com/#!/ja-jp/cid=PN.CH.JP-PN.CH.MIXED.JP-CATEGORY00000778