Shuza (朱座) was the Tokugawa shogunate's officially sanctioned cinnabar monopoly or cinnabar guild (za)^[1] which was created in 1609.^[2]

Initially, the Tokugawa shogunate was interested in assuring a consistent value in minted coins; and this led to the perceived need for attending to the supply of cinnabar.

This bakufu title identifies a regulatory agency with responsibility for supervising the handling and trading of cinnabar and for superintending all cinnabar mining and cinnabar-extraction activities in Japan.^[3]

• Bugyō
• Kinzan-bugyō
• Kinza – Gold za (monopoly office or guild).
• Ginza – Silver za (monopoly office or guild).
• Dōza – Copper za (monopoly office or guild)

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• Jansen, Marius B. (1995). Warrior Rule in Japan. Cambridge: Cambridge University Press. ISBN 9780521482394; OCLC 422791897
• Schaede, Ulrike. (2000). Cooperative Capitalism: Self-Regulation, Trade Associations, and the Antimonopoly Law in Japan. Oxford: Oxford University Press. ISBN 9780198297185; OCLC 505758165
• Takekoshi, Yosaburo. (1930). The Economic Aspects of the History of the Civilization of Japan. New York: Macmillan Publishers. OCLC 313511699