Via Gematsu:
Disappointing to hear, considering it was free in the past.
Sega will release the paid downloadable content "Additional Challenge Expansion Pack" for Yakuza: Like a Dragon "soon" in Japan, which will add additional challenge elements such as "New Game Plus" and a "High Difficulty Mode" limited to a second playthrough, the company announced.
Disappointing to hear, considering it was free in the past.