This documentary delves into the captivating world of Japanese native sea urchin, one of the most prized delicacies in Japanese cuisine. The journey of sea urchin from the ocean floor to the dining table showcases its significance in Japanese food culture. Viewers will follow the camera into coastal waters, watching professional divers harvest these spiny creatures, and witness how the freshest sea urchin in bustling seafood markets is highly sought after for its creamy texture and rich marine flavor.

The documentary also highlights the intricate process of harvesting and handling sea urchin, emphasizing the skill and precision required to prepare this delicate ingredient. Through interviews with renowned chefs, marine biologists, and culinary experts, the film explores the status of sea urchin in high-end Japanese cuisine, from traditional sushi to its growing popularity in global gastronomy.