Since the industrial revolution, we have lost significant shares of the abundance of marine life, and we have lost about 50% of blue natural capital. However, in recent years, there has been growing attention to nature-based solutions that integrate biodiversity conservation and climate change mitigation. In particular, blue carbon habitats such as mangroves and seaweed contribute both to climate change mitigation and to the restoration of coastal ecosystems. Blue carbon is an important strategy that redefines the ocean as a reproductive common and supports the transition to a sustainable society.

The concept of "nature positive" is shifting from theory to implementation, and the financial sector has begun placing natural capital at the core of capital allocation. The global impact investment market is projected to roughly double in size by 2030, with the ocean and nature sectors emerging as key areas of growth. Drawing on market trends and concrete examples, this article outlines the effectiveness of impact investment in the ocean sector and the essential points of its implementation.

Seaweed forests are quietly disappearing from coastlines around Japan. The film We Are Here and Here We live: Following The Disappearing Seaweed Forest documents people across the country, over the course of two years, who are confronting the phenomenon of “isoyake” (denudation of seaweed beds). Since its release in January 2025, the film has drawn a cumulative audience approaching 10,000 people. Through the "Umimori Baton"(Seaweed Forest) initiative, which provides a highlight version of the film to schools free of charge, I hope to pass the future of our oceans on to the next generation.