noun, noun which may take the genitive case particle 'no'
self-centered; selfish; egocentric
Describes a person, attitude, or action that prioritizes one's own interests or perspective over others'. Often used critically.
I'm fed up with his self-centered attitude.
Teamwork won't work with a self-centered way of thinking.
自己中心的 is a more common and direct adjective meaning 'self-centered', while 自分本位 emphasizes acting based on one's own standards or interests, often with a nuance of selfishness.
利己的 explicitly means 'selfish' or 'egoistic', focusing on pursuing personal gain, whereas 自分本位 can also simply mean 'self-oriented' without necessarily implying harm to others.
Compound of 自分 (self) and 本位 (standard, basis), literally 'self as the standard'. The word 本位 is used in compounds to indicate something is the primary principle or focus.