Grand Blue: Story, Cast and Series Facts

Story and premise

Iori Kitahara is a college student living along in a coastal city who meets scuba-diving and fun-loving upperclassmen.

Among the seaside town of Izu's ocean waves and rays of shining sun, Iori Kitahara is just beginning his freshman year at Izu University. As he moves into his uncle's scuba diving shop, Grand Blue, he eagerly anticipates his dream college life, filled with beautiful girls and good friends.

But things don't exactly go according to plan. Upon entering the shop, he encounters a group of rowdy, naked upperclassmen, who immediately coerce him into participating in their alcoholic activities. Though unwilling at first, Iori quickly gives in and becomes the heart and soul of the party. Unfortunately, this earns him the scorn of his cousin, Chisa Kotegawa, who walks in at precisely the wrong time. Undeterred, Iori still vows to realize his ideal college life, but will things go according to plan this time, or will his situation take yet another dive?

Series details

• Title: Grand Blue
• Format: Animation
• Language: Japanese
• Genres: Comedy, Anime
• Premiere date: 2018-07-13
• Status in TVmaze: Running
• Network listed by TVmaze: MBS
• Network country: Japan
• Typical episode runtime: 30 minutes
• TVmaze community rating: 6/10
• TVMaze ID: 37215
• IMDb ID: tt8086718
• TVDB ID: 343913

Seasons in the TVmaze catalogue

• Season 1: premiered 2018-07-13; final listed air date 2018-09-28; episode order: 12.
• Season 2: premiered 2025-07-07; final listed air date 2025-09-22; episode order: 12.
• Season 3: premiered 2026-07-06; final listed air date 2026-09-21.

Source and licence

Adapted from Grand Blue on TVmaze. The synopsis is reproduced as plain text; catalogue facts, cast and season records are selected and reformatted. This adapted text is available under CC BY-SA 4.0, following the TVmaze API licence. Network and web-channel credits identify the service listed in this source; they do not establish current streaming availability.