Sailor Moon Cosmos is a 2023 Japanese two-part animated action fantasy film directed by Tomoya Takahashi and written by Kazuyuki Fudeyasu based on the Stars arc of the Sailor Moon manga by Naoko Takeuchi, who also serves as a chief supervisor. Co-produced by Toei Animation and Studio Deen, and distributed by Toei Company, Cosmos is a direct sequel to Sailor Moon Eternal (2021) and serves as the "fifth and final season" in the Sailor Moon Crystal anime series. The two-part film stars Kotono Mitsuishi as the voice of Sailor Moon and Chibi-Chibi alongside Kenji Nojima, Misato Fukuen, Hisako Kanemoto, Rina Satō, Ami Koshimizu, Shizuka Itō, Junko Minagawa, Sayaka Ohara, Ai Maeda, Yukiyo Fujii, Nana Mizuki, Marina Inoue, Saori Hayami, Ayane Sakura, and Megumi Hayashibara. Cosmos was released in Japan in June 2023, with the first film on the 9th, and the second film on the 30th.

Sailor Moon 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, 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" . 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.