Tara Océan Japan, a general incorporated association dedicated to marine research and conservation, will hold a marine education event, "Unraveling the Secrets of the Sea Forest with Science! Let's Learn About Blue Carbon Ecosystems," on August 1, 2026 (Sat) at the Hokkaido University Akkeshi Marine Science Station in Akkeshi, Hokkaido, as part of the "Tara JAMBIO Blue Carbon Project." This event marks the second time it will be held in Akkeshi, following the event in 2024. Following last year's focus on "seaweed," this year's theme is "seagrass beds" that spread across Akkeshi Bay, and participants will learn in a fun way through experiments and observations about the role and importance of "blue carbon ecosystems" created by seagrass and seaweed. The "Tara JAMBIO Blue Carbon Project" is a project aimed at scientifically investigating "blue carbon ecosystems" composed of seaweed, seagrass, etc., and widely communicating their importance. At research bases across the country, in addition to research activities, marine education and outreach events are also held for local communities. In Akkeshi, research and marine education events targeting seaweed were held in 2024. This time, the research target is expanded to seagrass beds, which are seagrass, to learn about their ecology and their role as a blue carbon ecosystem. What's the difference between "seaweed" and "seagrass"? How does seagrass absorb carbon dioxide in the sea? These questions will be explored through seminars, beach cleanups, wildlife observation, and photosynthesis experiments, providing an experiential learning opportunity about the mechanisms and roles of blue carbon ecosystems. Previous participants commented, "I was able to learn about the types of trash and how to sort them during the beach cleanup" and "It was interesting to observe various creatures." This event offers new discoveries not only for first-time participants but also for those who attended the 2024 event. We offer an opportunity to