Minamoto no Sanetomo
Minamoto no Sanetomo, planning a voyage to China, allegedly had a big ship built here, but then couldn't sail it because of Sagami Bay's shallowness. Zaimokuza during the Kamakura period was a busy port of call for the commerce of lumber, and through it passed much of the material for the construction of Kamakura's famous temples and shrines. This is in fact the origin of its name: "Zaimoku" means lumber, and "za" was the guild of timber merchants and craftsmen of the area who served businessmen and temples. When the tide is low, at the west end of the beach are still visible the remains of Wakae Island, the oldest artificial island in the country and the harbor that served both Zaimokuza and Kamakura.