first example of the atlus/sega synergy...? hm
Since Atlus being owned by Sega? Yes.
But before ATLUS helped the localization of SEGA's Shining Force: Resurrection of the Dark Dragon (GBA), Shining Soul I (GBA), Shining Soul II (GBA), Puyo Puyo Fever (NDS) and Shiren The Wanderer (Wii).