| Blue Flag | |
| Ja Kanji: | 青のフラッグ |
| Ja Romaji: | Ao no Furaggu |
| Type: | manga |
| Author: | Kaito |
| Publisher: | Shueisha |
| Demographic: | Shōnen |
| Imprint: | Jump Comics+ |
| Magazine: | Shōnen Jump+ |
| First: | February 1, 2017 |
| Last: | April 8, 2020 |
| Volumes: | 8 |
| Volume List: |
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is a Japanese manga series written and illustrated by Kaito. It was serialized on the Shōnen Jump+ manga website from February 2017 to April 2020.
The series is written and illustrated by Kaito. It started serialization on the Shōnen Jump+ manga website on February 1, 2017,[1] and ended on April 8, 2020.[2] It has been published in eight tankōbon volumes.
At Anime Expo 2019, Viz Media announced they licensed the series in English.[3] Manga Plus also published the series in English.[4] It is also licensed in French by Kurokawa,[5] in German by Carlsen Verlag,[6] in Italian and Portuguese by Panini Comics,[7] and in Spanish by Editorial Ivrea.[8]
In 2017, the series was ranked third at the 3rd Next Manga Awards in the web category.[9] The series was a finalist for the 2020 Los Angeles Times book prize in the graphic novels category.[10] The Young Adult Library Services Association listed the series in the top ten in their 2021 list of the 126 best graphic novels for teenagers.[11]
Rebecca Silverman from Anime News Network gave the first four volumes an A−, praising it for the art, characters, and story, while criticizing it because sometimes some characters can feel overly abusive or shy.[12] Melina Dargis from The Fandom Post gave the series heavy praise for its story and characters, saying it was the best high-school slice-of-life manga of the year by far.[13] Like Silverman and Dargis, Demezela from Anime UK News praised the story, artwork, and characters, ultimately rating the first volume a nine out of ten.[14]