noun
Refers to the historical group of 47 masterless samurai who avenged their lord in the early 18th century. This is a proper noun and product name.
四十七士の物語は、忠義の象徴として語り継がれている。
The story of the 47 Ronin has been passed down as a symbol of loyalty.
From 四十七 (forty-seven) + 士 (samurai, warrior). The term refers specifically to the historical group of 47 ronin led by Ōishi Kuranosuke.