Your Name.

Mitsuha Miyamizu is a high school student in Itomori, a rural town in Gifu. Bored of her provincial life, she wishes to be reborn as a boy in Tokyo. Soon, she begins to intermittently switch bodies with Taki Tachibana, a high school student and part-time waiter from Tokyo's Shinjuku ward. On certain days, they wake up in each other's bodies and must live the entire day as the other, reverting to their bodies during sleep. They set rules for sharing their bodies, communicating via writing on paper, their phones, and their skin. In each other's bodies, Mitsuha sets Taki up on a date with his coworker Miki Okudera, while Taki increases Mitsuha's popularity at school, and accompanies her grandmother Hitoha and younger sister Yotsuha to a shrine within the Goshintai crater. He offers kuchikamizake fermented with Mitsuha's saliva. Hitoha explains God's sovereignty over both time and the connections between humans. Mitsuha informs Taki that Comet 279P/Tiamat is expected to pass nearest to Earth on the day of the autumn festival. The next day, Taki goes on a date with Okudera in his own body; she enjoys it, but, through his unusual behavior, infers Taki's preoccupations with someone else. Realizing his feelings for Mitsuha, Taki attempts and fails to call her. The body-switching stops inexplicably.

Taki, Okudera, and his classmate Tsukasa Fujii travel to Hida to search for Mitsuha. Unfamiliar with her town's name, Taki sketches it from memory. A Takayama ramen-shop owner, recognizing Itomori, offers to take them there. They discover its ruins, almost entirely decimated by Tiamat's fragments (while Mitsuha's messages simultaneously vanish from his phone). The comet having passed in 2013, Taki realizes Mitsuha's separation from him by three years, because he lived in 2016. At Hida City Library, the three discover that the Miyamizus and their friends were among its 500 fatalities. Taki begins to lose his memories of Mitsuha. Later, Taki rushes to Goshintai to imbibe Mitsuha's kuchikamizake. Upon doing so, he faints, undergoing a vision chronicling much of her life, realizing that she once came to Tokyo to find him. Although then unaware, she passed her kumihimo braid onto him, which he has worn as a lucky bracelet ever since. He awakens in Mitsuha's body on the festival's morning. Hitoha undergoes an epiphany upon observing "Mitsuha's" uncharacteristic behavior; speaking directly to Taki, she reveals that the body-switching has been in their family for centuries. Taki enlists Mitsuha's friends Sayaka and Tessie to force an evacuation prior to Tiamat's impact by destroying Itomori's substation and hijacking its emergency broadcast system. He returns to the shrine, where Mitsuha has awakened in his own body. At twilight, their timelines intersect, allowing them to meet in person. Taki returns Mitsuha's braid; as they attempt to write their names on each other's palms, twilight ends before Mitsuha can write hers.

Returning to Itomori, Mitsuha finds that the mayor, her estranged father Toshiki, had instructed residents to stay put. She persuades him to instead order an evacuation. Beginning to forget Taki, she discovers that he wrote "I love you" on her hand instead of his name. Taki awakens in his own time without memory of Mitsuha.

Five years later, Taki has graduated from university; with persistent melancholy, he struggles in job-searching. He has continuously fixated on the Itomori meteor strike, in which Itomori's residents were miraculously saved by a last-minute evacuation order. Eventually, on April 8, 2022, he glimpses Mitsuha, now a Tokyo resident, on a parallel metro train; they race to find each other. On the steps of Suga Shrine, Taki calls out to Mitsuha, and they simultaneously ask for each other's names.