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The following document is for 4/CN-731 eyes only.

Unauthorized access is prohibited.

Item #: SCP-CN-731 4/CN-731


One side of the entrance lobby of SCP-CN-731. The glyph on the floor in the center is visible.

Special Containment Procedures: SCP-CN-731 is currently contained in a facility publicly presented as a Western-style house constructed in the 1940s. Unauthorized personnel are to be turned away on grounds of cultural preservation.

Description: SCP-CN-731 is a Western-style marble building located in Harbin City, Heilongjiang Province, China. At the main entrance is a bronze plaque reading "SCP Foundation Department of AbnormalitiesSCP財団 怪奇部門"; directly above the entrance, carved in the marble, is the logo of the IJAMEA, which has been visibly scratched out but remains discernible with effort; when discovered, it was present along with the Foundation-related plaque. Documentation shows that the building and associated facilities are all related to the IJAMEA's Project Shinka, which began in 1936.

Black ceramic tiles in the shape of a circle can be found in the floor of the entrance lobby; the very center of the circle is in the shape of the Rising Sun Flag, with 12 rays emanating from the center instead of the common 18 rays found in the standard Rising Sun Flag. Similar symbols have been found in IJAMEA-related documents, and it is theorized that it is related to the ritual mystic activities carried out by the IJAMEA.

At the back of the lobby is a corridor that leads to the underground portion of SCP-CN-731. This area has suffered severe human-caused damage; current records suggest that this damage was intentionally caused by the IJAMEA after Japan's defeat in 1945. The layout of the underground construction corresponds to the layout of the "black Rising Sun" in the lobby. The circular entrance contains 12 corridors, of which one remains locked and inaccessible. The remaining 11 corridors each lead to a room of identical size and shape, but different layout, which indicates that they may have been used for different purposes.

Addendum CN-731-01: Current status of underground rooms

Room #: 01

Description: Accessible at time of discovery. The internal temperature of the room can be as low as -40 degrees Celsius; the walls, floor and ceiling are frozen in ice. A pile of pine needles and branches covered in frost is located at the center of the room; at the top is a bloodstained section of human finger bone. No other objects are present.

Room #: 02

Description: Accessible at time of discovery. Room contains simple living quarters, consisting of a bed, a metal table, a toilet, etc. At one side of the room, on a table, is a glass box with the corpse of a mouse and a small bottle containing a glass ampoule of congealed blood. Subjects who touched the ampoule reported early symptoms of bubonic and pneumonic plague, which recovered after seven days.

Room #: 03

Description: Accessible at time of discovery. Room contains a broken vacuum pump produced in 1936 and a cylindrical steel vacuum chamber, large enough to hold one adult human, with a circular glass porthole on the outside and a quartz window on the inside. On the other side of the room is a chair and table; on the table is a fountain pen produced in the 1930s and a blank leatherbound notebook.

Room #: 04

Description: Accessible at time of discovery. Room is divided into two sections by a thick sheet of quartz glass (SCP-CN-731-4); the sections are connected by a sealable metal door. A bird cage is hung on the side of the room accessible from the entrance, with the dehydrated corpse of a crested myna (Acridotheres cristatellus) inside. The other side of the room contains a long office desk and two chairs; several notebooks have been left on the table, one of which has been left open to a drawing of the structural formula of mustard gas.

Room #: 05

Description: Accessible at time of discovery. Room contains a metal operating table, one surgical light, several cabinets of galvanized iron and one complete set of steel medical dissection tools. On the autopsy table is a rough sackcloth bedsheet stained in blood over virtually its entire surface. Analysis of the bloodstain revealed that it contained the DNA of at least ███ different human subjects. A steel scalpel has been left on top of the bedsheet.

Room #: 06

Description: Accessible at time of discovery. Appears to be a filing room, containing a large amount of documentation regarding the actions of the IJAMEA between 1936 and 1945. By O5 order, all information has been sealed indefinitely. A broken sound recording device has been discovered on an office desk in the room.

Subject attempted to turn on the recording device. Although nobody else present reported hearing anything, the subject claimed to hear "a deafening screaming and groaning, and then a few shouted phrases in Japanese1, ending in the sounds of an explosion." Testing with different subjects revealed different effects, all of which contained screaming and groaning, conversation and cries for help in Japanese, and the sound of an explosion. As there is no means of retrieving or duplicating the recording, no further information can be retrieved.

Room #: 07

Description: Accessible at time of discovery. The destruction of the door of this room directly led to the discovery of SCP-CN-731; this occurred on 1945/08/14. The interior of the room has been heavily damaged; there is a hole in the floor in the center of the room, and in addition to several collapsed walls, there is a large pile of human bones and unidentified personal belongings. The bones are estimated to belong to approximately 3500 different people, aged between 2 and 90.

Within the room is a photo of six people, a young couple dressed in rural clothing holding a baby, and two girls and one boy standing next to them. Subjects viewing the photo experienced emotional instability after 30 seconds, covering their face and crying. All attempts to question affected subjects on this effect have ended in failure.

Room #: 08

Description: Previously sealed; the kanji for "Shinka神化" were visible above the metal door. Observed to be opened on 1945/12/31; at the same time, the text above the door disappeared. The interior of the room appears to be a laboratory in a state of extreme disarray. When discovered, a tattered IJAMEA ensign was found to have fallen to the floor; it is theorized that it was previously hung on the wall. The room also contains a microscope, an operating table, a set of dissection tools, a set of surgical tools, an office desk and one chair. A large number of documents left behind by the IJAMEA were discovered on the table; these documents have not been found in other places. In the corner of the room are six glass specimen jars, containing tissue samples of a human heart, skin from a human neck, a human tongue, a human eyeball, a right hand, and a human brain. These specimens appear to exhibit a slight reality warping ability.

Room #: 09

Description: Previously sealed; the kanji for "calming spirits鎮霊" were visible above the door. Observed to be opened on 1948/11/03; at the same time, the text above the door disappeared. The interior of the room appears to be laid out in a simplified version of the main shrine of a typical Japanese Shinto shrine; however, no text is visible on any objects in the room. At the far end of the room is a basalt stele, black in color with no text engraved.

Subjects who touched the surface of the stele claimed that in the following few days they invariably dreamt of "several million people standing in the darkness watching them" every time they slept. According to subjects' testimony, the people closest to the subject in the dream "had suffered severe bodily harm".

Room #: 10

Description: Previously sealed; the kanji for "garrison駐留" were visible above the door. Observed to be opened on 1988/11/30; at the same time, the text above the door disappeared. The interior of the room appears to be a standard IJAMEA six-room dormitory; the names above the beds have been scratched out. One bed remains unused; the other five bear traces of some degree of use. The following items were retrieved from areas corresponding to each bed in the room:

  • Bed #1: A family photo (one young man in the photo appears to match SCP-4007-1 in facial features)
  • Bed #2: A diary (owned by "Takashi Honda"2), containing his experiences stationed in the Philippines during Japanese occupation.
  • Bed #3: A 1946 edition of the Communist Manifesto. (The text "To my friend and comrade, Joichiro Ida / 友人である同志の飯田丈一郎氏へ" is written in Japanese on the title page.) Between two pages is a letter confirming Joichiro Ida3's induction into the Japanese Communist Party.
  • Bed #4: A full-body hanging portrait of Japanese Showa Emperor, Hirohito, wrapped in a Rising Sun flag. The portrait has been hung before.
  • Bed #5: A Japanese Kabuki mask.
  • Bed #6: Unused. A portrait of a young man wearing a Showa-era high school uniform is placed at the head of the bed, as if to signify mourning the deceased. The face of the man has been covered by a bloodstain and cannot be identified.

Room #: 11

Description: Previously sealed; the kanji for "suppression制圧" were visible above the door. Observed to be opened on 2002/08/26; at the same time, the text above the door disappeared. On the floor is a letter; the recipient's name has been deliberately erased, while the sender's name is listed as "Teruo Nishimura西村 輝夫"4.

The contents of the letter concern the differences in position and action plan of the five members of SCP-4007; however, much of the letter has been waterlogged and is indecipherable. The last two lines of the letter, however, remain readable:

Please stop, Matsui-kun. Don't continue down this path of sin.

We have no other choice — that's where history is.

Hung on the wall of the room is a map of East Asia and the Pacific produced in 1936, with five locations highlighted, corresponding to the locations of the five members of SCP-4007. Of these, the markers indicating the locations of SCP-4007-1 through SCP-4007-3 have been wiped off, and the marker indicating SCP-4007-5's location is currently slowly fading.

Room #: 12

Description: Currently remains locked; the kanji for "forgetting忘却" are still visible above the door. The room is sealed by five iron chains, of which the first, second, third and fifth have broken, and only the fourth continues to hold the door shut.

Evaluation has shown that the fourth chain is in a state of metal fatigue, and may break at any time.

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