[s1e25] One Of Us -

: The sequence features stylized transitions, such as the CP0 agents (Lucci, Kaku, and Stussy) appearing in a hangar bay followed by Dr. Vegapunk and his satellites.

In the context of the long-running anime One Piece , is titled "UUUUUS!" (or simply "Us!"), performed by Hiroshi Kitadani . This opening debuted during the Egghead Arc (specifically Episode 1089) to celebrate the series' 25th anniversary.

The song and its accompanying animation serve as a high-energy tribute to the journey of the Straw Hat Pirates:

: It was released around the time of "One Piece Day '25," a major fan event celebrating the franchise's quarter-century milestone.