The Shellmidden or Shellmound Period (Japanese: 貝塚時代, Kaizuka jidai) is one of the periods of the prehistory of the Okinawa and Amami Islands. It is defined...

the construction of the namesake gusuku fortresses. Following the Shellmidden Period, the Gusuku is generally described as beginning in the 11th century...

Jōmon period does not apply as the Jōmon people were absent from these places. Instead, common chronology for the area uses the Shellmidden Period or the...

generally divided into two periods: the Paleolithic era and the Shellmidden period (Kaizuka period).: 14  The earliest evidence of human activity in Okinawa...

that shellmiddens (or shellmound sites) did not appear until the latter Early Jeulmun. Choe and Bale estimate that at least 14 Middle Jeulmun period (c...

100 m above sea level in modern Changwon City, Gyeongsang Nam-do. A shellmidden (shellmound) was found in the vicinity of Namsan, indicating that, in...