Task: Explanation
Input (English): Nakayoshi (なかよし , "good friends") is a monthly "shōjo" manga magazine published by Kodansha in Japan. First published in December 1954, it is a long-running magazine with over 60 years of manga publication history. The target demographic for "Nakayoshi" (like "Ribon" and "Ciao") is girls of age 8–14. Roughly the size of a phone book (hence the term "phone book manga"), it generally comes with "furoku", or small gifts, such as popout figures, games, small bags, posters, stickers, and so on. The "furoku" is an attempt to encourage girls to buy their own copies of the magazine rather than just share with a friend. In the mid-1990s, Nakayoshi retailed for 400 yen and had an average of 448 pages. The estimated circulation of Nakayoshi at this time was 1,800,000. In 2007, its circulation was 400,000. Question:  Cherry Juice was originally serialized in a monthly "shōjo" magazine with a target demographic of what? Answer: girls of age 8–14
Output (English): Nakayoshi なかよし , good friends is a monthly shōjo manga magazine published by Kodansha in Japan.