“When I was starting to make work about nuclear issues, I wondered: How do you capture something that is not in front of you? If the camera is a device that has a lens pointed forward and captures what exists in front of you, how do I capture something that's gone or invisible, like radiation or history or memory?” said artist Kei Ito. Read more in this interview with him:
https://georgiamuseum.org/gmoa_blog/an-interview-with-artist-kei-ito-georgia-museum-of-art/