Grand Blue Dreaming Anime Gets 4th Season
Grand Blue Dreaming is getting another season. The anime's official website confirmed on Tuesday that a fourth season is in production, and the staff put out a visual alongside the news. The timing was about as tight as these things get: the third season's 12th and final episode had aired only the day before, on Monday.
What was confirmed
That third season started on July 6, airing on Tokyo MX and BS11, and it took the series to Palau. That made it the first time the show has been set somewhere other than Japan. The season before it closed out with its own 12th episode back in September 2025, and it had an unusual road to the finish line: the whole second season leaked online in July 2025, and the last episode in that leak already carried word of a third season.
The source manga was started by Inoue and Yoshioka in Kodansha's Good! Afternoon magazine in April 2014. Kodansha USA Publishing handles the digital English release, and Crunchyroll previously put out chapters in step with their Japanese debut. The first television anime premiered in July 2018, with Amazon Prime Video streaming it worldwide as it aired. A live-action film adaptation opened in Japan in August 2020.
What has not been announced
Nearly everything a viewer would want to plan around. There is no premiere date, not even a month or a year. No episode count has been given. No cast members have been listed, and no staff have been named, including a director, a writer or an animation studio. No networks or streaming services have been confirmed, and nothing has been said about where the fourth season will be set or what part of the manga it will cover. Details about what the announcement visual actually depicts have not been provided either.
Why it matters
A same-week renewal reads, to me, like a project that was already moving before the finale went to air. Franchises that wait for ratings and disc numbers tend to sit quiet for months. This one did not, and the second season's history makes that read even more plausible, given that a third season was flagged inside the leaked material rather than saved for a post-finale reveal. Whoever is steering this series appears comfortable confirming the next block early.
The Palau arc is the other thing worth sitting with. Moving the show out of Japan for the first time is a structural change, not a cosmetic one, and it suggests the adaptation is willing to follow the manga into its bigger set pieces rather than staying anchored to a familiar campus rhythm. Whether the fourth season keeps traveling is unknown, but the third proved the format can stretch.