Cuirass Versus Lamellar Armor
There were two types of [Japanese] armor: the solid iron cuirass (tankō) and lamellar armor (keikō). The former may have been introduced from Southeast Asia and is seen on many clay figurines of sixth-century [C.E.] fighters. Although it was composed of separate pieces of metal fastened together by leather or bolts, the cuirass permitted little freedom of movement, and lost its popularity after the year 400 [C.E.].
Lamellar armor was of Northeast Asian origin and was the accepted battle wear after 500 [C.E.] because it was lighter than the cuirass and allowed greater mobility. It was especially well-suited for mounted warfare. About 800 pieces of iron went into each suit….
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