Sailor Moon R: The Movie is a 1993 Japanese animated superhero fantasy film directed by Kunihiko Ikuhara and written by Sukehiro Tomita based on the Sailor Moon manga series by Naoko Takeuchi. Produced by Toei Animation, it takes its name from the second season of the anime series, as Toei Company distributed it around the same time. It centers on the arrival of an alien named Fiore on Earth, who has a past with Mamoru and wishes to reunite with him, but is being controlled by an evil flower called Xenian Flower, forcing the Sailor Guardians to save Mamoru and the Earth from Fiore's destruction. The film stars Kotono Mitsuishi as the voice of Sailor Moon, alongside Aya Hisakawa, Michie Tomizawa, Emi Shinohara, Rika Fukami, Tōru Furuya and Hikaru Midorikawa. It was released in Japan on December 5, 1993, alongside a 15-minute short recap episode titled Make Up! Sailor Soldier (メイクアップ!セーラー戦士, Meikuappu! Sērā senshi; later as Make Up! Sailor Guardians).

Pioneer Entertainment released it in the United States on February 8, 2000. On January 13, 2017, Viz Media re-released the film re-dubbed and uncut for the first time in US theaters. The Sailor Moon R: The Movie redub also included the English dubbed 15-minute short Make Up! Sailor Guardians. It was later premiered in Canada on March 1, 2017.

It is the first film installment for the series, and was followed by two standalone sequels, Sailor Moon S: The Movie (1994) and Sailor Moon SuperS: The Movie (1995).

Usagi and Chibiusa overhear two girls talking about the Sailor Guardians after they see a poster. As the girls debate over the smartest, most elegant, strongest, and the leader of the Sailor Guardians, Usagi grandly claims those titles for herself. Chibiusa shakes her head at Usagi's delusion. Clips appear from the debut of each Sailor Guardian, and that girl's image song plays in the background. When even Tuxedo Mask has been mentioned, and the girls are about to leave, Usagi butts in on their conversation and asks them directly about Sailor Moon. The girls give a series of glowing compliments about Sailor Moon, but unlike their analysis of the other Sailor Guardians, they also list her faults. After the girls leave, Usagi sarcastically apologizes to the viewers for being a clumsy cry-baby and then bursts into exaggerated tears.

A young Mamoru Chiba hands a mysterious boy a rose before he disappears, vowing to bring Mamoru a flower. In the present, Mamoru meets up with Usagi Tsukino and the Sailor Guardians at the Jindai Botanical Garden. Usagi attempts to kiss Mamoru, but when he suspects the other girls of spying on him, he walks off outside alone.

The stranger appears from the garden's fountain and takes Mamoru's hands into his own, which makes Usagi uncomfortable. Usagi tries to break the man's grasp from Mamoru but is knocked down. The man vows that no one will prevent him from keeping his promise before disappearing again. Mamoru tells Usagi that the stranger's name is Fiore (フィオレ, Fiore). At Rei Hino's temple, the Sailor Guardians discusses an asteroid that has started to approach Earth and on which Luna and Artemis have discovered traces of vegetal life. The talk turns into rumors about Mamoru's and Fiore's possible relationship, while Usagi thinks about how Mamoru had told her that he had no family and was alone, and how she had promised him she would be his family from now on.

Fiore sends his flower-monster henchwoman, Glycina (グリシナ), to Tokyo to drain the population's life energy, but the Sailor Guardians free them and destroy the monster. Fiore appears, revealing his responsibility for the attack, and uses a flower called a Xenian (キセニアン, Kisenian) before severely injuring the Sailor Guardians. Mamoru attempts to talk Fiore out of fighting but the Xenian controls Fiore's mind. After Mamoru saves Usagi from certain death by intercepting his attack, Fiore takes Mamoru to an asteroid rapidly approaching Earth and begins to revive him in a crystal filled with liquid. While in the crystal, Mamoru remembers meeting Fiore after his parents died in a car accident. Mamoru had previously assumed that he had made up the boy as an imaginary friend. Fiore explains that he had to leave Mamoru because of the Earth's unsuitable atmosphere; Mamoru gave Fiore a rose before disappearing. Fiore searched the galaxy to find a flower for Mamoru, finding the Xenian in the process. Seeking revenge on the humans for his loneliness, Fiore returns to Earth.

Meanwhile, Luna and Artemis tell Sailor Guardians that the Xenian can destroy planets using weak-hearted people. Ami Mizuno realizes that the energy from the asteroid matches the flower monster's evil energy, deducing that Fiore has hidden there. The Sailor Guardians decides to rescue Mamoru. Despite her initial reluctance, the Sailor Guardians and Chibiusa convince Usagi to save Mamoru and confront Fiore.