The Takamagahara (
The earliest that is know about Takamagahara was that they bought the Wadatsumi land from the Amanohokosaka family after that the Magick Association tried to crush them. There in Wadatsumi they built the laboratory, known as Wadatsumi Laboratory.
In the Wadatsumi Laboratory, Takamagahara started to develop the T-system but in order to be able to temper its main core, the Code: Embryo, Takamagahara was provided by the Magick Association the Original Grymoire.
After Wadatsumi Incident, the Takamagahara was disbanded and one of the survivors, Sōichirō Unomaru, would continue the creation of the T-system with backing from Mitsurugi Agency.
All traces of Code: Embryo and the Original Grymoire disappeared and would not be found until ten years later.