Sailor Moon (Japanese: 美少女戦士セーラームーン, Hepburn: Bishōjo Senshi Sērā Mūn, originally translated as Pretty Soldier Sailor Moon[1] and later as Pretty Guardian Sailor Moon[2][3]) is a Japanese manga series written and illustrated by Naoko Takeuchi. It was originally serialized in Kodansha's shōjo manga magazine Nakayoshi from 1991 to 1997; the 60 individual chapters (reorganized into 52), along with several side stories, were compiled in 18 volumes. The series follows the adventures of a schoolgirl named Usagi Tsukino as she transforms into the eponymous character to search for a magical artifact, the "Legendary Silver Crystal" (「幻の銀水晶」, Maboroshi no Ginsuishō, lit. "Phantom Silver Crystal"). She leads a group of comrades, the Sailor Soldiers, called Sailor Guardians in later editions, as they battle against villains to prevent the theft of the Silver Crystal and the destruction of the Solar System.
Source:
https://en.wikipedia.org/wiki/Sailor_Moon