The main cast has been announced for the forthcoming anime adaptation of the Grand Blue Dreaming manga:
- Yūma Uchida is Iori Kitahara
- Ryohei Kimura is Kohei Imamura
- Hiroki Yasumoto is Shinji Tokita
- Katsuyuki Konishi is Ryujiro Kotobuki
- Chika Anzai is Chisa Kotegawa
- Maaya Uchida is Nanaka Kotegawa
- Toa Yukinari is Azusa Hamaoka
- Kana Asumi is Aina Yoshiwara
Shinji Takamatsu is serving as director, scriptwriter, and sound director at animation studio Zero-G. Hideoki Kusama is the character designer.
Grand Blue Dreaming is scheduled to premiere in Japan in Summer 2018.