Johansson said that when "Ghost in the Shell" was first brought to her attention it "seemed incredibly daunting," adding that her daughter was still very young, and "my head space was not at all like, in the 'Ghost in the Shell.'"
"But I thought, gosh, it's really hard to turn down the opportunity to be front and center for something that has such a built-in fanbase that's like, so dedicated and totally obsessed," the actress said.
"And also, you know, to be able to have the studio back something like this," Johansson added, "as an actor ... as a woman, it's rare. I hope it's not always so rare, but it is."
"I think this character is living a very unique experience, in that she is human brain in an entirely machinate body," Johansson said. "She's essentially identityless."
"I thought to myself ... I can play this character," Johansson added. "I would never attempt to play a person of a different race, obviously."
"Any question of my casting will hopefully be answered by, you know, by audiences when they see the film," the actress said.
Johansson, who has recently made headlines for being politically vocal, told Strahan that she would not rule out working in politics in the future.
"I think it's more important for me to stand up for what I believe is right, and for what I believe in," the actress said, adding that she comes from a very "politically vocal family."
"I've always like I said, been interested in local politics. It's not something that I would ... turn away from," she said.
Finally, the actress dished on what fans can expect from the next "Avengers" film, set for release in 2018.
"Ghost in the Shell" hits theaters nationwide on Friday.