Osaka Copper Theatre

...However, due to a decline in copper production in Osaka, the copper mining company was abolished in 1712 (Shotoku 2) and 17 members of the Osaka copper smelters were contracted to produce 5 million kin of copper for the Nagasaki Imperial Copper Supply. Copper production further declined and the 4.5 million kin of copper exports set by the Kaihakugoshi Shinrei (1715) (1.5 million kin from the Netherlands and 3 million kin from China) could no longer be secured, so the shogunate re-established the copper mining company in Osaka in 1738 (Genbun 3) and stipulated that the Osaka copper mining company would have exclusive rights to purchase all copper produced, that the copper mining company would decide the division of copper produced between local sales and copper exported to Nagasaki according to the amount of copper produced, that each mine would report its annual copper production plan for the following year to the copper mining company, and that the Osaka copper smelters company would have a monopoly on copper silver production (Nanban smelting). According to records from 1574 (An'ei 3), the price of copper exported from Nagasaki was set at 115 momme of silver per pickle (100 jin) for copper with a fixed price for China and 60 momme 25 silver for the Netherlands.

*Some of the terminology used to refer to "Osaka Doza" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…しかし大坂登銅が減少したため12年(正徳2)銅座を廃止，長崎御用銅500万斤として大坂銅吹屋仲間17人に請け負わせることとした。さらに銅産は減少し，海舶互市新例（かいはくごししんれい）(1715)の輸出銅定高450万斤(うちオランダ150万斤，中国300万斤)も確保できなくなったため，幕府は1738年(元文3)大坂に銅座を再興し，いっさいの産銅を大坂銅座が独占購入すること，地売銅と長崎輸出銅とのふりわけは出銅高に応じて銅座が決定すること，各鉱山は翌年の年間産銅計画を毎年銅座に申告すること，銅からの絞銀冶金(南蛮絞り)は大坂銅吹屋仲間の独占とすること，などを定めた。長崎輸出銅値段は74年(安永3)の記録によると定高の銅について1ピクル(100斤)当り，中国向けには銀115匁，オランダ向けには銀60匁25と定められていた。…

※「大坂銅座」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報