- Celebrity Voice Actor: Mitsuko Horie, who is mostly known as an anisong singer, plays Akko in the 1988-1989 series remake. She also provides the Anime Theme Song of this one.
- Channel Hop: The 1969 series aired on TV Asahi, the 1988 and 1998 series aired on Fuji TV. In addition, the 1969 series was rerun during the 1980s on both Nippon TV and TV Tokyo, giving the franchise the distinction of having aired almost across the entire spectrum of Japanese commercial broadcast TV.
- Completely Different Title:
- In Italy, the three series are known as "Lo Specchio Magico" ("The Magic Mirror"; '60s), "Un Mondo di Magia" ("A World of Magic"; '80s), and "Stilly e lo Specchio Magico" ("Stilly and the Magic Mirror"; '90s)
- The 1980s version was dubbed in French as "Caroline" ("Cah-roh-LEEN").
- The first series was dubbed into Spanish as "Los Secretos de Julie". (The Spanish version of the 1969-70 ED song: "Julie, Julie, Julie es feliz...")
- Creator Backlash: Fujio Akatsuka is said to have been displeased with the anime at first (which changed a number of elements of the manga), as well as perplexed that a manga he had finished several years earlier was suddenly getting an anime adaptation, but eventually came around once he realized that the anime was an entity of its own.
- He Also Did: This is an example for Fujio Akatsuka, who in Japan is often associated with slapstick-heavy gag-mangas, most notably Osomatsu-kun and Tensai Bakabon.
- Referenced by...: Akko's full name is Atsuko Kagami. The protagonist of Studio Trigger's Little Witch Academia is named Atsuko "Akko" Kagari.
- We Interrupt This Program: The original airing of the 1988 series episode "Ganmo's Perfect Rakugo Theater" was interrupted the minute before it could air by a news report about Emperor Hirohito's death.
Trivia / Himitsu no Akko-chan