Continuity mistake: Whilst Mima is shopping after cutting herself on a broken cup, the logo on the bag she is holding has a full stop in between each letter, spelling the logo as "F.G.G", but when she finds the bag in her wardrobe later on, the logo now has no full stops in between the letters, with the logo now being spelled as "FGG." (00:55:13 - 00:58:25)
Revealing mistake: Just after Mima is questioned by the reporters about the murders of the screenwriter and the photographer, the scene cuts to an overview shot of a set inside a studio. In the shot, many of the people on the set are drawn without faces. (00:59:13)
Revealing mistake: When Mima is first shown being attacked by the stalker, in the shot where the stalker says "Like anyone can hear you right now", we can see that the two of them are drawn without faces. (01:04:13)
Suggested correction: This isn't an error, just a common stylistic choice in a lot of animated films.
Continuity mistake: When the stalker has Mima pinned against the floor of the set, in a wide shot, his right hand can be seen holding onto her lower arm. It then cuts to a shot much closer to them where his right hand is now holding onto her hand. (01:04:14)
Other mistake: After Mima sees the CHAM poster has been stuck back to the wall, there is a wide shot of her room. In the shot, there is a calendar on the wall to the left of frame, but the numbers are wrong. After the number 10, the calendar skips straight to 14, missing out 11, 12 and 13. Additionally, the number 21 has been repeated twice on the calendar. (01:09:33)
Continuity mistake: In the shot just before Mima peeks behind the curtain to see the train tracks right beside her apartment, on her bed there is a pink heart-shaped pillow and a purple heart-shaped pillow placed on top of it. Later in the scene, when Rumi (or the other Mima) starts attacking her just before she falls onto the bed, the two pillows are now in two separate positions. (01:09:35 - 01:11:13)
Revealing mistake: When Mima sees the train passing by outside the window, a white shirt can be seen hanging onto a wardrobe door in the reflection of the window. We are then shown a shot in front of Mima walking away from the window and the shirt hanging onto the wardrobe is now black. (01:09:42)
