Portuguese 1543 arrival triggered 100-year Japanese Cyclopean boom. Portuguese first arrived in Japan in 1543 Portuguese introduced firearms, transforming samurai warfare within 100 years Before firearms, castles were built of wood and earth
When Portuguese traders first arrived in Japan in 1543, they brought firearms that transformed samurai warfare within a century. Before this, castles were built of wood and earth. Samurai rapidly copied and mass-produced rifles, which led to centralized military rule. Shoguns later invaded Korea and Okinawa in 1609, possibly gaining polygonal masonry inspiration. By 1639, Portuguese were expelled and Cyclopean construction ended abruptly.
Key Facts
- Portuguese first arrived in Japan in 1543
- Portuguese introduced firearms, transforming samurai warfare within 100 years
- Before firearms, castles were built of wood and earth
- Samurai quickly copied and mass-produced rifles
- Gun proliferation led to centralized military dictatorship under new shoguns
- Shoguns invaded Korea and Okinawa (1609), possibly bringing polygonal masonry inspiration
- Portuguese expelled in 1639, immediately ending Cyclopean construction
- Shimabara Rebellion (1638) and Dutch support led to Catholic suppression
Related site: Osaka Castle — view location, images, and history on the Ancient Nerds map.
Source: Incredible: What the Japanese were building - The complete unknown story of ancient stone wonders by One-eyed giant building walls