The lore runs pretty deep. The president of ILCA (and former Namco planner)
Takuya Iwasaki runs a lot of companies that share office space. He is the president of every company (except MONACA where he is a director).
ORCA,
Bandai Namco Aces, and
MONACA (ACG/idol music production) share the same HQ as ILCA. He is also the president of
Dearstage and
Perfect Music. They are J-pop idol agencies that share the same office as ILCA's Higashi-Shinjuku studio (only 1km away from HQ).
Edit: Out of every video game series, it seems like Yoko Taro's Drakengard/NieR is the only series where Takuya Iwasaki is involved in every title. According to salromano on ResetEra, Yoko Taro's company
BUKKORO also shares the same office as ILCA.