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motoyoshi_fleet_yards's primary propulsion research and production division. Their administrative offices are in on Jiyuu System located in the heart of Tokyo, and their main facility is located at Shang Yards, a Hephaestus Fleet Yard in the Yugumo Cluster.
Most FTL and STL drives and components produced by motoyoshi_fleet_yards go through every stage of design at Shang Yards or are overseen at the vessel's construction site by Kakujitsusei Propulsion Laboratories personnel.
Designs finalized and in service.