For a carbon dioxide-free society, a new technology has been developed for culturing a large amount of seaweed that absorbs carbon dioxide in the sea.

Kajima Construction Co., Ltd., a major general contractor, developed the new technology.

With the new technology, it has become possible to artificially cultivate a large amount of seaweeds such as Arame and Ecklonia cava, which are a member of the kelp family and inhabit nationwide.

In the culture medium, the small cells that are the source of seaweed were grown hundreds of times in a month, and then the seaweed seedlings that were grown were successfully transplanted into the sea in Hayama Town, Kanagawa Prefecture.

While carbon dioxide absorbed by forests is called "green carbon", carbon dioxide absorbed in the sea is called "blue carbon", which is a field that is drawing attention for decarbonization.

However, on the coast of Japan, the decrease in the habitat of seaweed due to the effects of landfill and rising seawater temperature has become an issue, and the company is utilizing new technology in collaboration with fisheries cooperatives and NPO corporations nationwide. I want to connect it to the reproduction of.

Katsunori Yamaki, Senior Researcher at Kajima Corporation, said, "I think it is important for a construction company to conserve nature, so I would like to contribute to the efforts of blue carbon."