Go! Go! Loser Ranger!
, also known as Ranger Reject, is a Japanese manga series written and illustrated by Negi Haruba. It has been serialized in Kodansha's Weekly Shōnen Magazine since February 2021, with its chapters collected in twenty volumes as of 2025. An anime television series adaptation produced by Yostar Pictures aired from April to June 2024. A second season aired from April to June 2025.
Plot
Thirteen years ago, the Villainous Army of Evil attempted to invade Earth, faced by the Super Sentai squadron known as the Divine Japanese dragon, also known as the Dragon Keepers, and their super weapons, the Divine Tools. The evil army, however, was defeated within a year, all of its Executives wiped out, and the surviving foot soldiers have been forced ever since to reenact their defeat to the Keepers in front of a crowd of spectators every Sunday. Tired of the charade, and realizing that this amounts to little more than slavery, one of the foot soldiers rebels and decides he will defeat the Dragon Keepers by infiltrating the organization.Characters
Main
;Footsoldier D;Hibiki Sakurama
;Yumeko Suzukiri
Dragon Keepers
The Dragon Keepers organization comprises the five "First Class" Dragon Keepers and those under their command. Each Keeper has their own battalion with distinct responsibilities within the organization, and each member has a different rank determined by their respective Keeper. The First Class Keepers also possess the Divine Tools that have the power to permanently kill members of the Villainous Army, although lower-ranking members can be assigned replicas or other weapons with similar power.First Class
;Sosei Akabane Red Keeper;Shougo Aoshima Blue Keeper
;Shinya Kiritani Yellow Keeper
;Chidori Green Keeper
;Sesera Sakurama Pink Keeper
;Keisuke Souma Blue Keeper
;Noa Hagino Pink Keeper
Red Battalion
;Shun Tokita;Kai Shion
;Funga Baraki
;Jin Himura
;Dairyu Azuki
;Yamato Beni
;Shochiku Umezawa
Blue Battalion
;Komachi Aizome;Eigen Urabe
;Kujaku
;Konno
;Aran Hekiru
;Sorakaze
Green Battalion
;Kanon Hisui;Angel Usukubo
;Kanade Tokiwa
Yellow Battalion
;Akane Yamabuki;Angelica Yukino
;Nagisa Chabatake
Pink Battalion
;Masurao NadeshikoColorless Rangers
The "Colorless" refer to the lowest-ranking members of the Keeper hierarchy, and are often looked down upon by those higher up the ranks.;Soujirou Ishikawa
;Renren Akebayashi
;Yamato Kurusu
;Tsukasa Shippou
;Ranmaru Koguma
Others
;Draggie-kun;Kyosuke Wakaba
;Mine Gatou
;Yuu Nishiki
;Masashi Nishiki
;Shigenobu Murakami
;Yakushi Usukubo
;Yulimerida
;Kaede Ukyo
;Juji Sazan
;Inko Tachibana
;Daisuke Daidai
;Kiisu
;Ruuna
Villainous Army
Executives
;Peltrola;Hwalipon
;Magatia
;Andrega
;Todomask
Dusters
;Footsoldier A;Footsoldier B
;Footsoldier C
;Footsoldier F
;Footsoldier G
;Footsoldier H
;Footsoldier L
;Footsoldier N
;Footsoldier Z
;Footsoldier XX
Production
On October 27, 2020, Negi Haruba started recruiting regular assistants for his coming new series. On December 23, 2020, it was announced that Haruba would start his new manga series Go! Go! Loser Ranger! on February 3, 2021.Media
Manga
Go! Go! Loser Ranger! is written and illustrated by Negi Haruba. The series began serialization in Kodansha's Weekly Shōnen Magazine in the 10th issue published on February 3, 2021. Kodansha has collected its chapters into individual volumes. The first volume was released on April 16, 2021. As of November 17, 2025, twenty volumes have been released.In November 2021, during their panel at Anime NYC, Kodansha USA announced their license to the series and would release it in both print and digital.
On February 19, 2025, it was announced the manga was going on a two-issue hiatus due to Haruba's health issues. It went on another hiatus on May 7 of the same year due to the same reason.
Anime
An anime television series adaptation was announced on December 6, 2022. It was produced by Yostar Pictures and directed by Keiichi Sato, with scripts written by Keiichirō Ōchi, and character designs handled by Kahoko Koseki, with Kenji Hayama serving as animation supervisor. The series aired from April 7 to June 30, 2024, on TBS and its affiliates. The opening theme song is "Jikai Yokoku", performed by Tatsuya Kitani, while the ending theme song is "Seikai wa Iranai", performed by Akari Nanawo. The series is streaming worldwide on Disney+, and on Hulu in the United States, with the English dub premiered on Hulu on June 12, 2024.Following the final episode of the first season, a second season was announced, which aired from April 13 to June 29, 2025, on the Agaru Anime programming block on all JNN affiliates, including CBC and TBS. The opening theme song is "Maji de Sekai Kaechau 5-byō Mae", performed by Orange Range, while the ending theme song is "Seigi", performed by Fukurow note.