Grand Blue Season 3 Trailer Reveals July 6 Debut and Theme Songs
The Palau setting shifts Grand Blue's comedy from its familiar Japanese college environment to an overseas location for the first time, a change the sources highlight as a narrative departure.
Key Facts
- The third season of Grand Blue Dreaming premieres on July 6 on Tokyo MX and BS11, with additional broadcasts on MBS from July 7 and AT-X from July 9.
- The opening theme song is 'Natsuko' by FUNKY MONKEY BΛBY'S, and the ending theme song is 'Hadaka no Mermaid' by MAMESHiBA NO TAiGUN, produced by comedian and actor Kuro-chan.
- The season is set in Palau, marking the first time the story moves outside Japan.
- Returning director Shinji Takamatsu handles direction, script, and sound direction at studios ZERO-G and Liber.
- New cast members include M.A.O as Karina, Sayaka Ōhara as Sayaka Kotegawa, Asami Seto as Chief, and Aya Suzaki as Maki.
Reporting from 3 sources: Anime News Network, Anime Corner, The Fandom Post.
The third season of the Grand Blue Dreaming anime will premiere on July 6 on Tokyo MX and BS11, with additional broadcasts on MBS from July 7 and AT-X from July 9. The main promotional video, released on June 11, previews the opening theme song "Natsuko" by FUNKY MONKEY BΛBY'S and the ending theme song "Hadaka no Mermaid" by MAMESHiBA NO TAiGUN, which was produced by comedian and actor Kuro-chan. The season is set in Palau, marking the first time the story moves outside Japan. Returning director Shinji Takamatsu is handling direction, script, and sound direction at studios ZERO-G and Liber. Previously announced new cast members include M.A.O as Karina, Sayaka Ōhara as Sayaka Kotegawa, Asami Seto as Chief, and Aya Suzaki as Maki. The second season concluded in September 2025, and the third season was announced shortly after its finale.
Returning director Shinji Takamatsu is also handling the script and sound direction, the same triple role he held for the second season. Hideoki Kusama returns as character designer, with Yoichi Ueda as chief animation director. Reiko Kasuga oversees art direction and Yukari Hashimoto composes the music.
The opening theme "Natsuko" is performed by FUNKY MONKEY BΛBY'S. The ending theme "Hadaka no Mermaid" is performed by the girl group MAMESHiBA NO TAiGUN. Comedian and actor Kuro-chan produced the ending song.
Previously announced new cast members for the third season are:
- M.A.O as Karina
- Sayaka Ōhara as Sayaka Kotegawa
- Asami Seto as Chief
- Aya Suzaki as Maki
Returning voice cast includes Yuma Uchida as Iori Kitahara, Ryohei Kimura as Kohei Imamura, and Chika Anzai as Chisa Kotegawa.
The second season ended with its 12th episode in September 2025. The entire season had leaked online in July, and the final episode in the leak listed a third season. The third season was announced shortly after the finale aired.
The manga, written by Kenji Inoue and illustrated by Kimitake Yoshioka, began serialization in Kodansha's Good! Afternoon magazine in April 2014. Kodansha USA Publishing releases the manga digitally in English. The first anime season aired in July 2018, and a live-action film opened in Japan in August 2020.
Synthesized by Yomimono from the 3 cited sources below, including Japanese-language reporting where cited, then editorially reviewed before publishing.