also: さんごくぶそう
noun which may take the genitive case particle 'no', noun
unparalleled in the three countries (Japan, China, India)
Archaic expression referring to something unmatched across the three great ancient nations of Japan, China, and India. Often used in historical or literary contexts. Compare with 三国一.
See also: 三国一
彼の武勇は三国無双と称えられた。
His bravery was praised as unparalleled in the three countries.
Also means 'unparalleled in the three countries', but 三国無双 emphasizes being without equal, while 三国一 focuses on being number one.
Compound of 三国 (three countries: Japan, China, India) and 無双 (unparalleled, matchless). The exact historical derivation is uncertain, but it follows a classical pattern of praising something as supreme across the known world.