Legends of the Deep: The Giant Squid, directed by Yasuhiro Koyama in 2013, stands as a fascinating documentary that pursues one of the ocean’s greatest mysteries. The film follows an international team of scientists as they venture into the deepest waters off Japan’s coast, deploying cutting-edge underwater technology and submersible vessels in an ambitious quest to locate and capture footage of the legendary giant squid—a creature that has eluded human observation for centuries. At 1,000 metres beneath the surface, where sunlight cannot penetrate and pressure would crush most living things, these researchers believe they have finally narrowed down the squid’s lair. This documentary represents the culmination of decades of dedicated research, combining scientific rigour with the unmistakable sense of adventure that comes with exploring Earth’s final frontiers.
When the film was released, it generated considerable enthusiasm among both documentary enthusiasts and general audiences across Europe and beyond. The combination of groundbreaking scientific exploration and visually stunning deep-sea cinematography resonated with viewers fascinated by marine biology and the unknown depths of our planet. The film’s reception highlighted a growing appetite for documentaries that blend education with spectacle, presenting genuine scientific endeavour alongside the inherent drama of the unknown. Critics praised the production’s technical achievements and its respectful approach to presenting scientific methodology to mainstream audiences.
However, it is Joe Hisaishi’s extraordinary musical score that truly elevates Legends of the Deep from a conventional documentary into something profoundly moving and transcendent. Hisaishi, renowned for his collaborations with Hayao Miyazaki and his distinctive compositional voice, approached this project with remarkable sensitivity to both the scientific narrative and the emotional undercurrents of deep-sea exploration. His score navigates the tension between wonder and isolation, creating a sonic landscape that mirrors the expedition’s psychological and physical journey downward into darkness.
The composer employs a sophisticated orchestral palette that evolves throughout the film, beginning with delicate, almost ethereal passages that evoke mystery and anticipation. As the narrative progresses deeper into the abyss, Hisaishi’s orchestrations become increasingly complex and layered, incorporating unconventional instrumental textures that suggest the alien environment of the deep ocean. The music never overwhelms the documentary’s visuals; rather, it creates a complementary emotional space that allows viewers to fully absorb both the scientific data and the profound sense of venturing into the unknown.
What distinguishes Hisaishi’s approach is his ability to infuse the score with genuine humanity amidst the technological grandeur. Recurring thematic elements underscore the scientists’ determination and courage, while softer, more introspective passages accompany moments of revelation and discovery. The composer understands that this documentary is ultimately about human curiosity and our relentless drive to understand our world. The music reflects this beautifully, balancing grand orchestral moments that celebrate technological achievement with intimate, vulnerable passages that capture the profound solitude of encountering something previously unknown to mankind.
Hisaishi’s score for Legends of the Deep demonstrates his mastery of film music as storytelling—proving once again why he remains one of cinema’s most respected composers. The music doesn’t simply accompany the images; it deepens our emotional connection to the scientific quest itself, transforming an extraordinary documentary into an unforgettable cinematic experience that lingers long after the final frame.