partisan spirit; factionalism
Refers to a narrow-minded loyalty to one's own faction or party, often with a negative connotation of prejudice or stubbornness.
His opinion is nothing more than partisan prejudice.
The discussion was heavily factional and not constructive.
Similar meaning, but 党派根性 carries a stronger nuance of stubborn, ingrained bias.
Refers to factional consciousness or cliquishness, often in organizational contexts; 党派根性 is more about a prejudiced mindset.
Compound of 党派 (tōha, 'faction, party') and 根性 (konjō, 'disposition, spirit'). The exact historical derivation is uncertain, but the term likely emerged in political discourse to criticize narrow partisanship.