Grand Blue Dreaming Season 3 Reveals Opening Theme Song and Key Visual
Published: May 28, 2026 | Category: Anime News, Summer 2026 | By: Anime Roulette Staff
The official key visual for Grand Blue Dreaming Season 3, revealed on “Scuba Diving Day” (May 24) in Japan.
On May 24, 2026 — “Scuba Diving Day” in Japan — the official website for Grand Blue Dreaming unveiled the opening and ending theme song artists for the highly anticipated third season, alongside a striking new key visual. The announcement confirms that this beloved comedy anime is diving into uncharted waters: the Palau arc, taking the cast overseas for the first time ever. Here’s everything you need to know.
Opening & Ending Theme Songs Revealed
The Season 3 music lineup features two exciting acts:
The Japanese hip-hop group, celebrating their 20th anniversary, crafted the song with the theme of retrieving treasures left behind in summers past. They commented: “We hope that the summer of 2026 will be a sparkling and beautiful time for everyone!”
The idol group brings their unique energy to the closing credits of each episode.
The Palau Arc — First Overseas Adventure
For the first time in the anime’s history, Grand Blue Dreaming Season 3 leaves Japan behind. The story moves to the tropical paradise of Palau, where the diving shop Dolphin has opened a branch. Short on staff, Nanaka calls in Iori and the gang to help out, setting the stage for a new wave of booze-fueled chaos under the Pacific sun.
The new key visual showcases all seven main characters walking together on a southern island — a noticeably more stylish look than previous Grand Blue promotional art, hinting at the exotic new setting.
New Cast Members
Three new voice actors are joining the cast for the Palau arc:
- Sayaka Ohara as Sayaka Kotegawa — The Kotegawa sisters’ mother
- Asami Seto as Chief — A diving shop worker in Palau
- Aya Suzaki as Maki — Another Palau diving shop employee
Returning Cast
The core cast from Seasons 1 and 2 are all reprising their roles:
- Yuma Uchida as Iori Kitahara
- Ryohei Kimura as Kohei Imamura
- Chika Anzai as Chisa Kotegawa
- Maaya Uchida as Nanaka Kotegawa
- Kana Asumi as Aina Yoshiwara
- Toa Yukinari as Azusa Hamaoka
- Hiroki Yasumoto as Shinji Tokita
- Katsuyuki Konishi as Ryujiro Kotobuki
Production Staff
- Director / Scriptwriter / Sound Director: Shinji Takamatsu (Haven’t You Heard? I’m Sakamoto)
- Animation Studios: ZERO-G and Liber
- Character Design / Chief Animation Director: Hideoki Kusama
- Music: Yukari Hashimoto (Mr. Osomatsu, Sarazanmai)
Preview Screening Event
A preview screening with stage greeting will be held at Shinjuku Wald 9 in Tokyo on June 19, 2026. Attendees include:
- Yuma Uchida (Iori Kitahara)
- Ryohei Kimura (Kohei Imamura)
- Chika Anzai (Chisa Kotegawa)
- Kana Asumi (Aina Yoshiwara)
About Grand Blue Dreaming
Written by Kenji Inoue (Baka and Test — Summon the Beasts) and illustrated by Kimitake Yoshioka, Grand Blue Dreaming has been serialized in Kodansha’s Good! Afternoon magazine since April 2014. The manga has sold over 10 million copies and has been collected into 24 tankōbon volumes. Kodansha USA publishes the manga digitally in English.
The story follows Iori Kitahara, who moves to a seaside town for college and ends up joining the university’s wild diving club, Peek-a-Boo. What starts as an innocent college debut quickly descends into a chaotic whirlwind of alcohol, naked antics, and surprisingly heartfelt scuba diving adventures.
More Anime News
Looking for more summer 2026 anime coverage? Check these out:
- The Iceblade Sorcerer Season 2 Announced for October 2026 — Magic academy sequel from ZERO-G
- The Eccentric Doctor of the Moon Flower Kingdom Anime Announced — Shojo medical fantasy from Studio Elle
- Red River Anime Reveals Full Cast, July 7 Premiere — Classic shojo isekai finally gets animated
- Top 10 Must-Watch Anime of 2026 — Our picks for the year’s biggest titles
- Mushoku Tensei Season 3 Unveils New Key Visual — The journey of Rudeus Greyrat continues
Stay Updated
Bookmark Anime Roulette for the latest Grand Blue Dreaming Season 3 updates. We’ll cover the preview screening, additional cast announcements, and episode reviews when the series premieres this July.
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Sources: Anime News Network | Comic Natalie | Anime Corner | Image © Kenji Inoue, Kimitake Yoshioka, Kodansha / Grand Blue 3 Production Committee
