A girls manga by Naoko Takeuchi that began circulation in the monthly magazine “Nakayoshi” (Kodansha) in 1991. Book-length volumes have been translated into 17 languages, while the animated series has been released in more than 40 countries, making it a global phenomenon. The 20th anniversary project began in 2012. A new 25th anniversary project has been in development since 2017, taking the form of new animated works, a musical, and more. An electronic edition of the manga will be released for the first time in the summer of 2019. Translated into 10 languages, it will be launched simultaneously around the world and increase enthusiasm for the project overall.