This is a halophilous plant that only grows in a particular environment, such as a saltmarsh. Sea beans change in color into a deep red in the middle of October.
The reclaimed land around Yorishima is a unique place on Japan's main island where wild sea beans naturally grow.
In 1891, sea beans were discovered on an oyster island in Akkeshi-cho, Hokkaido. The Japanese name for the sea beans, Akkeshi-so, comes from the name of this town.
It is also called "Sangoso." (Chenopodiaceae, Salicornia)