Changes

*''Japanese'': 赤金・銅 ''(akagane, dou)''

*''Japanese'': 赤金・銅 ''(akagane, dou)''

Copper has been used for [[currency|coinage]] in China and Japan since ancient times, and was a major maritime trade and [[tribute]] good throughout the pre-modern to early modern period. In the [[Edo period]], copper was perhaps Japan's chief export, as the archipelago became the chief source of copper to the entire region.<ref>[[John Whitney Hall]], “Notes on The Early Ch’ing Copper Trade With Japan,” ''Harvard Journal of Asiatic Studies'' 12, no. 3/4 (December 1, 1949), 445.</ref>

Copper has been used for [[currency|coinage]] in China and Japan since ancient times, and was a major maritime trade and [[tribute]] good throughout the pre-modern to early modern period. In the [[Edo period]], copper was perhaps Japan's chief export, as the archipelago became the chief source of copper to the entire region,<ref>[[John Whitney Hall]], “Notes on The Early Ch’ing Copper Trade With Japan,” ''Harvard Journal of Asiatic Studies'' 12, no. 3/4 (December 1, 1949), 445.</ref> and quite possibly the largest producer of copper in the world.<ref>[[Marius Jansen]], ''China in the Tokugawa World'', Harvard University Press (1992), 16.</ref>

==Early Coinage==

==Early Coinage==