I've been looking through NIntendo's recruitment page and some of the interviews with various developers, and one thing I noticed was that there was a part within EPD called "Planning & Production Department" several producers and planners are assigned to. I assume this is the Department within EPD that comprises all the Production Groups that oversee and manage all the games. I remember EAD had the "Software Development Department" headed by Takashi Tezuka, which handled all the actual game development, so I'm pretty sure EPD has a "Software Development Department" as well, perhaps a "Technology Department" like EAD as well. Either way, Nintendo EPD's actual structure and hierachy is weirdly complex, similar to most other Japanese companies.