María Luz incident

The María Luz incident (マリア・ルス号事件, Maria-Rusu-Gō Jiken) was a diplomatic incident between the early Meiji government of the Empire of Japan and the Republic of Peru over a merchant ship holding Chinese indentured labourers in slavery-like conditions in Yokohama in 1872. It was an early test of the independence of the Japanese judiciary system and a challenge to the extraterritoriality provisions of the unequal treaties then in force between Japan and the western powers.