| Not to be confused with Annex Basement, a location present in Version 6.23 and Version 5.2. |
The basement (地下室 chikashitsu) is an area located inside the mansion in Version 3.0, Version 5.2, and Version 6.23. The basement layout differs substantially per version.
Walkthrough[]
Version 6.23[]
After you obtain the basement key, you will obviously be able to enter the basement. However, when you unlock the door, Mika's scream is heard. Hiroshi refuses to enter the basement until the player enters the kid's bedroom, where it's found that Mika has been killed by the Oni. A chase will begin, and after it ends, the player will be able to enter the basement.
When you enter the basement, the first thing you may notice is a shiny object placed on top of the nearest bookshelf to the entrance door. To obtain this item, go west to the new room (しん部屋 shin heya) and there will be a chair inside. Before you move the chair outside this room, move the chair toward the object placed on top of the central bookshelf in this room to obtain a flat head. Then push the chair toward the initial bookshelf to obtain the basement jail cell key.
When you head north, you will encounter Mika who swiftly transforms into an oni. Shortly thereafter; she starts to chase Hiroshi. In the meantime Takeshi's oni form joins the pursuit as well making for two onis to avoid.
As with the previous chase sequences, both have to be evaded. Once the coast is clear, go back to the basement. Go east to enter another room, then continue east and you will be in a completely dark room known as the basement jail (地下室 chikarō, lit. "dungeon"). Use the lighter and find your way to the jail cell's door and use the basement jail cell key. Once inside the cell, light the candle. Go back outside of the cell and view the writing on the walls from behind the bars. If done correctly, there should be four numbers visible.
Go back to the main room of the basement and move the two bookcases on the northern wall, revealing a panel held tight by four slotted screws. Use the flat head to replace the head of the driver, and the Phillips head screwdriver will change into the flat head screwdriver. Use the flat head screwdriver to unscrew the panel to reveal a vault beneath. Enter the code from the basement jail cell to obtain the annex key. From there, head east and upon attempting to open the door, an oni will appear from the closet. After escaping from this oni, you can return to this room and open the door, leading to the stairwell (階段 kaidan). From there, you can unlock the north door with the annex key to gain access to the annex.
Version 5.2[]
TBD
Version 3.0[]
TBD