In this animated adventure, Nobita and his friends embark on an underwater journey after discovering a mysterious mermaid civilization. With the help of Doraemon’s futuristic gadgets, they explore the depths of the ocean, encountering both allies and adversaries. The film, directed by Kōzō Kusuba, showcases vibrant animation and imaginative storytelling, capturing the essence of friendship and courage. While it hasn’t received any notable awards, it remains a beloved entry in the Doraemon series. For those interested, the movie can be viewed for free on 123Movies / Movies123.