In order to rehabilitate sandy beaches and restore biodiversity, we have carried out awareness building activities, (hands-on) experience learning, and research and studies in cooperation with residents, schools, companies, and government as part of environmental improvement of the ocean and beach creation. This project, which is held at Nojima-Kaigan coast, Kanazawa-ward, Yokohama city, where precious sand beach remains, provides primary students practical learning experience of cultivating laver. In particular, the students can learn about and practice laver seeding, setting ropes (in the sea), harvesting, and processing. This is in conjunction with learning about the blessings from the oceans and the connections with oceanographic phenomena (water temperature, water quality, current, sea tide, terrain, etc ). Through these activities, we provide the children the opportunities to learn how to coexist with society and the need of environmental improvements for oceans.