noun
Refers to the quality of being open, accessible, or receptive, often used in contexts like personality, systems, or policies.
彼の開放性がチームの雰囲気を良くしている。
His openness improves the team atmosphere.
この制度の開放性が多
The openness of this system attracted many participants.
オープンさ is a more casual, loanword-based way to express openness, often used in everyday conversation.
Compound of 開放 (かいほう, 'opening, release') and the suffix 性 (せい, '-ness, characteristic'), forming an abstract noun meaning 'openness'.