Who is Tsurumaru Kuninaga, and why is it a popular replica subject?
Updated Mar 2026
Tsurumaru Kuninaga is a historically documented Japanese tachi attributed to a swordsmith of the Yamashiro school, believed to date to the late Heian or early Kamakura period (roughly the 12th century). It is designated a Japanese national treasure and is renowned for its exceptionally white, mirror-polished surface - an unusual characteristic that sets it apart visually from the more common dark-polished blades of the era. The Touken Ranbu franchise, a Japanese media property that anthropomorphizes famous historical swords, brought widespread international attention to Tsurumaru Kuninaga through its distinctive white-and-gold visual identity. For collectors, replica versions of this blade offer a rare combination: documented historical pedigree, a distinctive aesthetic that photographs beautifully in a display setting, and connection to a beloved popular-culture interpretation.