Gusuku period

Historical period of the Ryukyu Islands

The Gusuku period is an era of the history of the Ryukyu Islands corresponding to the spread of agriculture and Japonic culture from Japan alongside increased social organization, eventually leading to endemic warfare and the construction of the namesake gusuku fortresses. Directly following the Shellmidden period, the Gusuku is generally described as beginning in the 11th century, following a dramatic social and economic shift over the previous centuries. The Shellmidden-Gusuku transition has been linked to Japonic-speaking migrants and influence from the Dazaifu trade outpost on Kikaijima, leading to the emergence of the Proto-Ryukyuan language.

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