1 Dollar - Elizabeth II Sakamoto Ryōma

Sakamoto Ryōma was assassinated in Kyoto in 1867 at thirty-three, just months before the Meiji Restoration he had helped engineer. His role in brokering the Satchō Alliance — the pact between rival Satsuma and Chōshū domains that effectively ended the Tokugawa shogunate — was largely unrecognized in official records during his lifetime, as much of his work was covert. Cook Islands gold miniatures of this type were produced under license as collector premiums rather than circulating currency, with the .9999 fineness targeting bullion-adjacent buyers in the Japanese commemorative market.