Hamada Port prospered early as a calling port of the Kitamae Ships. Aizuya Hachiemon, who was a merchant in Hamada, began to trade with foreign countries, and maintained the finance of the poor Hamada Clan in the Edo Period. A monument of Aizuya Hachiemon is standing on a rock facing Matsuhara Bay. Biography　Aizuya Hachiemon Aizuya Hachiemon went to Ullung-do (Ururun Island), which was previously called Take-shima, and he traded with foreign ships as well as conducting fishing and a tree felling business. He was eventually executed because an undercover trooper of Japan's feudal government, Mamiya Rinzo, got to know what Aizuya Hachiemon was doing.