Bushido is a name in common usage since the late 19th century which is used to describe a uniquely Japanese code of conduct adhered to by samurai since time immemorial.

武士道是自从19世纪晚期以来常用的名字，来形容从远古以来日本武士坚持的独特行为准则。

youdao

The "way of tea" had become an essential part of the samurai-influenced code of upper Japanese behavior.

CNN: ASIANOW - TIME Asia | The Subtle Magic of Koetsu

The Japanese believed in the unwritten Samurai code of conduct, known as Bushido, which held that the true warrior was willing to die for the Emperor and would never surrender.

CNN: 'Dying was easy: It's the living that's hard'

The businessmen of The Bad Sleep Well (1960) are samurai in business suits, gangsters in skyscrapers, with a code of honor no less remorseless.

CNN: ASIANOW - TIME Asia