Doors to the World

Nanami has two grandmothers: Baachan, who lives with her family in Japan, and Gram, who lives in Maine. When Gram visits Japan for the first time, Baachan takes her and Nanami on a trip to the seaside to gather Wakame, a long, curvy seaweed that floats near the shore.

While the three assemble their equipment and ride the streetcar to the beach, Baachan explains how Wakame and other seaweeds are used in Japan. Gram shares stories about how seaweeds are used in Maine, and Nanami translates for them both.

By the end of the day, Nanami's two grandmothers discover that they have much in common despite being from countries that fought in the war they both remember vividly. Now, looking out across the beach at the surfers, dog walkers, and seaweed gatherers, they share an appreciation of this precious peace.

Source: https://www.leeandlow.com/books/the-wakame-gatherers