The Camera Obscura is a device used to capture the "Other World" made by "Occultist" Kunihiko Asou. From the late 19th to the early 20th century, he tried to communicate with and get proof of this "Other World."

The term "Occultist" refers to people involved in the movement to verify Eastern thought using contemporary Western technology. Kunihiko Asou is a prime example of such an "occultist."
The "Camera Obscura" was one of his quintessential experiments. He modified the at the time still rare "camera", by adding a special lens and film. It was supposed to capture "unbelievable things" normally invisible to the naked eye, like a so-called "different phase interval" and "spirits and ghosts."
They are very rare nowadays, but apparently these cameras are still traded among curio dealers. Most have been broken, and we have lost the chance to "see the other world," as well as Asou's achievements, for eternity.
Notes:
- The title of the book as Rei picks it up of the shelf is given as "Occultism". Its Japanese title translates to "Proof of the Camera Obscura and Spirit World".
- When viewing this note in the menu you can view a picture of the Camera Obscura by pressing the O (circle) button.
- The reference to Dr. Asou living "from the late 19th to early 20th century" actually refers to the end of the Edo period (1603-1867) and into the Meiji period (1868-1912) in the Japanese text.
