Revealing mistakes: The cameraman is always filming the action, but the red LED that indicates that the camera is recording is never turned on.
Continuity: The length of the key changes several times.
Plot holes: In the Chiyoko's home, two cameras are used, but there is only one camera operator.
Errors made by characters (possibly deliberate errors by the filmmakers): There is a scene in which Chiyoko appears mounted on a carriage and dressed in Victorian-era dress, but this is never seen a magazine or poster, or any reference indicating that she could have been in a film of this type.
Factual errors: Chiyoko is doing the duties at home, while in television broadcast news of a space launch. The news indicates that the launch had seven astronauts (in the Japanese version). Given the date (July 20, 1969), the Apollo 11 mission had only three astronauts.
Anachronisms: In the Japanese Version, the news indicates that the astronauts of the Apollo 11 mission departed from Cape Canaveral in 1969. During the Apollo missions, the name was Cape Kennedy. The name of Cape Canaveral, was re-registered until 1974.
Factual errors: If the space mission that is spoken in the film is Apollo 11 mission, then there is an error saying that the launch date was the July 20. Launch date was July 16, 1969.
Anachronisms: The early Chiyoko's films (according to history during the late 30s and early 40s) are made in color, but Technicolor didn't arrive in Japan until the 1960s.