The TV anime Grand Blue (ぐらんぶる), based on the manga by Kenji Inoue and Kimitake Yoshioka, has been officially confirmed for a fourth season. The announcement came alongside the release of a brand-new key visual.
Key Visual Hints at a Love War
Season 3 of Grand Blue aired its finale on September 21, and the Season 4 production announcement followed immediately. The newly revealed visual features Chisa Kotegawa, Aina Yoshihara, and Sakurako Busujima in bikinis, set against a backdrop of a photo of Iori with a knife plunged into it — a striking image that strongly hints at an escalating romantic battle over the male lead.
Cast & Broadcast Window
Grand Blue Season 4 is scheduled to air in the Summer 2026 anime season. The full returning voice cast includes:
- Yuma Uchida
- Ryohei Kimura
- Hiroki Yasumoto
- Katsuyuki Konishi
- Tomoka Anzai
- Maaya Uchida
- Toa Yukinari
- Kana Asumi
- Aya Yamane
- Takuya Eguchi
- Junya Enoki
- Natsuki Hanae
- Robert Waterman
- Jun Fukuyama
- Sumire Morohoshi
- Yoshino Aoyama
- Shinji Kawada
- Nana Mizuki
- M·A·O
- Sayaka Ohara
- Asami Seto
- Aya Suzaki
About Grand Blue
Grand Blue is a comedy manga published by Kodansha, with the first volume released on November 7, 2014. The series follows a college student who moves to a seaside town and gets swept up in the chaotic world of a diving club, blending raucous humor with an unpredictable romantic storyline.
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