A simple well hut. There is a well in the center of the hut. Appearance: SCP-040-JP is a well hut that was left abandoned in the former village of ██, ██ Prefecture. The hut is a single-story wooden building, approximately 5m wide and 4m deep. In the center of the hut is a stone well estimated to have been built in ancient times, leading straight underground. The well is abnormally deep, and even investigations with probes have yet to determine how far it extends. When a human looks inside this hut, the subject becomes severely agitated and reports that "there was a cat." Furthermore, the subject becomes strongly obsessed with the idea that "there is a cat" from then on. This effect does not occur through photographs or video; it only happens when the interior of the hut is viewed directly with the naked eye. Camera footage only shows the aforementioned hut, and the reported cat has not been confirmed. Exposed subjects have their perception of all domestic cats (scientific name: Felis silvestris catus) distorted. In interviews with exposed subjects, domestic cats appear as hairless animals with featureless faces and two human-like eyes, which seem to stare straight at the subject regardless of the direction from which they are viewed. Furthermore, within a few days to weeks, exposed subjects begin to report feeling that this "cat" is in the darkness, and they become constantly concerned about the "cat's" gaze. No regularity has been found in the conditions of darkness where the "cat's" presence is reported, and it feels as though the cat appears in the darkness to monitor the exposed subject. The purpose of the monitoring and the total number of cats are unknown. According to research team records, the position where this "cat" appears is strongly suspected to be at the position of the lens or cornea within the human field of vision. In other words, it concentrated in positions outside the central field of vision and in dark areas within the field of vision, showing statistically significant results. As a result, this property was clearly demonstrated in an examination using D-class personnel in 19██, but according to a hypothesis proposed by [DATA EXPUNGED], it is inferred that the darkness from the deep underground structure existing inside SCP-040-JP is clearly exerting an influence.

Gender: Female (?) Height: 152cm Visible only to those who have looked into the well. Regardless of the occupied area, it is always in the field of vision. One appears for each person who has viewed it. The cat is transmitted when the person who viewed the well conveys its characteristics through speech, writing, video, paintings, etc. Appearance: Pure white skin. Hair is also white and cut in a bob style. Has cat ears and a tail. Wears a hakama. The face is generally well-formed, but the eyes are large black pupils that look like they could suck you in. Appears to be a young girl around 12 to 15 years old. Personality: Dazed and spacey. Often stares intently at people's eyes. Follows a person she likes at a distance that is neither too close nor too far. Prefers dark places. Approaches a person she likes regardless of the darkness. Does not cause physical harm. Gives an innocent impression. Easygoing. Particularly bad with heat. Hates midsummer. If it's too hot, she will look away. It seems SCP-040-JP has taken a liking to you. Communication through conversation is possible, but she speaks entirely in hiragana (translated here as lowercase) and in a polite "-desu," "-masu," "-deshita" style. Example: "i am a cat nice to meet you." "the cat is here."