The 1577 Portuguese voyage to Japan was a private Portuguese junk voyage to Japan that was blown off course by a typhoon and driven to the coast of Korea, where the damaged vessel was surrounded by many Korean boats. The Koreans attacked the junk's sampan and killed its crew, after which the Portuguese drove them off with firearms before attempting to repair the junk and escape.
Another similar voyage occurred in August 1578, which some regard as the first "documented physical presence of a European off the Korean coast", when a typhoon swept the Portuguese ship San Sebastián toward the Korean coast during its journey from Macau to Nagasaki, with fear of the locals prompting the crew not to land. In contrast, C. R. Boxer links this episode to the previous voyage in 1577. If this is true, then the commander, Domingos Monteiro, would be the first Westerner to have set foot in the country.