Koajiro Forest Conservation Activities

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Koajiro Forest Conservation Activities

Natural and environmental projects

Riviera Initiatives

The Koajiro Forest, located at the southernmost tip of the Miura Peninsula and surrounding the Riviera Seabornia Marina, is a continuous ecosystem of forest, wetlands, tidal flats and the sea, where rare species such as the red-clawed crab form a diverse ecosystem. It covers an area of ​​approximately 70 hectares, the equivalent of 15 Tokyo Domes.
Under the guidance of the NPO Koajiro Outdoor Activities Coordination Council, Riviera cooperates with Kanagawa Prefecture, Miura City, and the Kanagawa Trust Green Foundation, a public interest incorporated foundation, to regularly carry out conservation activities for virgin forests and tidal flats. They are focusing on "improving the river environment" by allowing river water to flow from its source to its mouth without destroying the natural ecosystem, as well as "cutting down bamboo grass and preventing invasive plants" in the course of wetland restoration work.

  • Photo: Red crab

Forest where Acategani lives

An unusual crab, Acategani that lives in the forest. On a full moon in the summer, on the tide night, mother crabs rush to the shore and release stomach larvae to the sea. Akagani can only be seen in Koajiro forest, where it can only live in places where beautiful forests and the sea coexist.

  • Photo: Fireflies

River where fireflies returned

Fireflies spend their larval life underwater and cannot live without a clean river all year round. The number of fireflies has also increased in Koajiro Forest due to river and wetland conservation activities. The forest where countless lights dance at night is very fantastic. Firefly observation sessions, which are held from the end of May every year, are also popular.

Mr. Yuji Kishi
Professor Emeritus of Keio University

"Koajiro no Mori" is about 70ha and 15 Tokyo Dome. It is "the only place in the Kanto region that can retain the entire ecosystem of the basin", and more than 2000 species of organisms have been confirmed. In order to protect this precious environment, it is important to frequent care with human hands. Trees are thinned so that they do not overgrow, and various insects inhabit by keeping the diversity of plants. Adjusting the flow of the river also widens the wetlands, increasing the variety of aquatic insects and attracting birds that feed on them. In this way, human beings are involved in nature, maintaining an appropriate natural environment and maintaining biodiversity. The Riviera also collaborates with NPOs to conduct regular maintenance activities by staff. In fact, wild fireflies returned in Koajiro. I hope that we will continue to walk with our hands so that people and nature can coexist.

Yuji Kishi / Representative Director, Koamidai Outdoor Activity Coordination Council Professor Emeritus of Keio University. Specializes in evolutionary ecology. Promote theory and practice related to urban regeneration of basin thinking in Koajiro and Tsurumi River basins. He has authored many books, including "Gaze to Nature" and "How to Create a Watershed Map".