Yellow Cake (イエローケーキ) is a Japanese company that works in the back end of the nuclear power, they took care of spent nuclear fuel and radioactive wastes. They secretly dump high radio active wastes into Tokyo by a B-2 Stealth Jet, a stealth bomber that won't be picked up by radar. The first place the Medic Unit has discovered that the stealth bomber was dumping high radio active wastes is at the Tamagawa Boat Race Lake. They also have dinosaur-like combat robots. One of Yellow Cake's office is on the 28th floor of Roppongi Hills.