SEGA Games Japan will announce this May 22, 2016 5 PM JST (early morning for us), on a special Nico Nico stream, details for its upcoming Phantasy Star Online 2 x Sakura Taisen collaboration. The collaboration will happen on PSO2 for all its existing versions in Japan: PC, PS4, and PS Vita.
Phantasy Star Online is celebrating 15 years of existence, while Sakura Wars is going for its 20th Anniversary this 2016.
[via NicoNico]