noun
lack of self-reflection; lack of introspection; unreflective
Refers to a state or attitude of not examining one's own actions, failures, or inner self. Often used in critical or psychological contexts.
彼の無反省な態度には驚かされる。
I'm amazed at his unreflective attitude.
失敗から学ぶには、無反省ではいけない。
To learn from failure, you must not be unreflective.
内省 is a more formal term for introspection, often used in psychology. 無反省 is broader and more common in everyday criticism.
Compound of 無 (mu, 'without') and 反省 (hansei, 'self-reflection'). The exact historical derivation is uncertain, but the word follows a common pattern of negation.