Grand Blue Dreaming is a college comedy about a boy who joins a diving club and spends more time getting drunk than getting wet. That sounds simple, and it mostly is. The anime follows Iori Kitahara, voiced by Yuma Uchida, as he moves to the Izu Peninsula to start college and stays in a room above his uncle’s diving shop, Grand Blue. He soon meets the local Diving Club, a group of older students who treat the ocean as a party venue and diving as an excuse to strip off their clothes.
The show ran for four seasons, spanning 36 episodes across seven years, from July 2018 to September 2026. It aired on MBS, TBS, Tokyo MX and BS11, and it was adapted from a manga by Kenji Inoue and Kimitake Yoshioka, serialized in Kodansha’s Good! Afternoon magazine since April 2014. A live-action film followed in August 2020, and the anime returned for a second season in 2025 and a third in 2026, both produced by Zero-G in partnership with Liber and Saber Works. A fourth season has been announced.
Trailer, via Anime Manga Official.
The Cast
Yuma Uchida carries the lead as Iori, a nervous new arrival who cannot escape the club’s pull. Ryohei Kimura plays Kouhei Imamura, and Chika Anzai voices Chisa Kotegawa, who tries to show Iori the actual joys of diving. Kana Asumi voices Aina Yoshiwara, Toa Yukinari voices Azusa Hamaoka, Katsuyuki Konishi voices Ryuujirou Kotobuki, and Hiroki Yasumoto voices Shinji Tokita. The ensemble sells the chaos of a club that treats its clubhouse like a bar and its dives like a weekend trip.
The humor leans on contrast. Iori wants to learn diving, but the club spends most of its time drinking, partying and stripping naked. The show tracks his attempts to distance himself from them while his cousins try to show him the wonders of the ocean. The balance between those two pulls is the engine of the series.
What Works
The best episodes of Grand Blue Dreaming are the ones that commit fully to absurdity. The show knows exactly what kind of comedy it is, and it does not apologize for it. Episodes that follow the club members into the water, stripped down and drunk, land with a rhythm that few comedies manage. The animation holds up the energy, and the voice acting sells the chaos.
“New adventures in booze and the ocean await.”
That line sums up the whole premise. The show is not trying to be a drama about friendship or growth. It is trying to be a show about a boy who gets dragged into a wild club and learns to enjoy the ride. When it commits to that, it works.
The worst episodes are the ones that drag. Some installments lean on repetition, recycling jokes about drinking and nudity that lose their edge after a few seasons. The pacing suffers in the middle stretch, where the series spends too much time on filler before the payoff. The show is at its best when it trusts its premise and its cast to carry the joke.
Ranking the Seasons
The four seasons of Grand Blue Dreaming can be ranked by strength, though the gap between them narrows as the show finds its footing:
- Season 1 (July 2018) — the strongest, establishing the world and the central conflict between diving and drinking.
- Season 2 (July 2025) — solid, though it leans harder on repetition.
- Season 3 (July 2026) — consistent, but the longest season drags in the middle.
- Season 4 — announced, not yet reviewed.
The first season sets the tone with precision. The later seasons benefit from a clearer understanding of what the show does well, but they also suffer from a sense that the joke has been told.
Where It Falls Short
The biggest weakness is pacing. Several episodes feel like padding, spending time on minor jokes that the earlier seasons had already covered. The show also leans heavily on visual gags about nudity, which can wear thin across multiple seasons. When the humor relies on repetition rather than fresh angles, the episodes lose their impact.
The live-action film and the fourth season remain untested territory, but the anime record stands as a comedy that hits its mark more often than it misses. The cast is committed, the animation is energetic, and the premise is a winner when it is not overworked.
Final Word
Grand Blue Dreaming is a show that knows its audience and delivers exactly what it promises. It is not subtle, it is not deep, and it is not trying to be. What it is trying to be is funny, and on its best days it succeeds spectacularly.
The live-action film and the fourth season remain untested territory, but the anime record stands as a comedy that hits its mark more often than it misses. The cast is committed, the animation is energetic, and the premise is a winner when it is not overworked.
Grand Blue Dreaming earns a 7.8 out of 10.
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