noun, noun which may take the genitive case particle 'no'
self-centeredness; selfishness; egotism
Describes a person or attitude that puts one's own interests, desires, or perspective above others. Often used critically.
彼の自己本位な態度にはうんざりする。
I'm fed up with his self-centered attitude.
自己本位の考え方では、周り
With a selfish way of thinking, it's hard to get along with others.
Compound of 自己 (self) and 本位 (standard, basis). The term likely emerged in modern Japanese to describe egocentric attitudes, possibly influenced by Western psychological concepts.