The first legion of the Star Army of Yamatai is based on Planet Yamatai. The First is commanded by Chujo Nakano Akio.

Their patch has an image of planet Yamatai in it.

It was formed in YE 32. In YE 33, the Legion was the primary ground force in the Battle of Yamatai.

• 50 Kagai-Class Assault Ship (3,400 crew)
  • 6 Ke-V6-1D "Hayabusa" Starfighter each (total of 300 fighters and 600 pilots and technicians)
  • 1 Ge-E1-1b - Tenba-Class Transporter w/ GS-E1-M3403 Troop Transport (MCS) each
  • 3 Ke-T7 "Raccoon" Transport Shuttle each
  • 2 Type 30 Container Handling Vehicle each
• 50 Type 31 Dropship
• 30,000 Star Army Infantry, Type 33
• 500 Yusou Type 33 Grav-APC (capable of holding 30 armored troops each)
• 100 Type 31 "Troll" Tanks
• 100 Type 30 Light Utility Truck
• 100 Type 30 Surface Terrain Vehicle
• 25 Recovery STV
• A large number of Type 33 Prefab Outpost Modules modules of various types