In the Grisaia no Kajitsu, Kazami Yuuji works for a company related to Ichigaya and the Japanese government.
But he very often states that the Japanese branch is indeed a branch of the main corporation in America.
So it seems to be some intelligence and special ops agency, but in a worldwide aspect.
What is this corporation exactly? Asahi Cleaning LLC is the front, that is not what I am asking.
Looking for answers from the VN, since the first season of the anime does not delve too deep into this.