Uta's Past Arc

The Uta's Past Arc is the fifteenth filler arc and the sixth filler arc after the timeskip. It ties into the movie ''One Piece Film: Red.

Summary
In the present day, the Straw Hat Pirates were sailing on the Thousand Sunny listening to Uta's song New Genesis on a Tone Dial. Meanwhile, Uta stood alone on the coast of an island and proclaimed that she was about to make her dream of performing a concert for the whole world come true.

Twelve years ago, a 9-year-old Uta was sailing with her father Shanks and the Red Hair Pirates. Shanks doted on Uta with pillaged jewelry but kept some of his findings, namely the Gomu Gomu no Mi, away from her. Shanks told Uta that the crew would be docking at the Goa Kingdom, and she was unimpressed by their landing spot of the remote Foosha Village. Meanwhile, a 7-year-old Monkey D. Luffy was spending his days eating, fighting animals, and training with his grandfather Garp. When the Red Hair Pirates docked, Luffy ran up to their ship and met Uta and Shanks. While initially apprehensive towards the pirates, Luffy quickly began asking to join Shanks' crew. Uta did not think very highly of Luffy and did not want him coming aboard; she performed a song at the Partys Bar one day to great acclamation from the villagers.

Afterwards, Shanks told Luffy to guide Uta around the village. The two children quickly got into a series of competition, which Uta typically got the better of Luffy in. Later, Luffy took Uta to the upper level of a windmill by the coast where they could see the sun set over the ocean, and as Uta talked about Shanks, Luffy expressed his desire to set out to sea as a pirate. As she watched the sunset, Uta first came to realize her dream of performing for the whole world.

Trivia

 * At two episodes, this is the shortest filler arc in the anime, alongside Cidre Guild Arc.
 * This is the third filler arc to come out during an ongoing arc, namely the Wano Country Arc, instead of between two arcs. The first was the Little East Blue Arc which came out during the Impel Down Arc, and the second was the Cidre Guild Arc which came out during the Wano Country Arc.
 * Both arcs also served to introduce an upcoming movie, the first being for Strong World and the second for One Piece: Stampede.
 * This arc currently contains the youngest depiction of Luffy in the entire One Piece franchise, and aside from brief portions of Chapter 1 and Episode 4, is the only media to depict Luffy without the scar below his eye.