noun
Refers to unmarried partners living together, often used in sociological or legal contexts. The English loanword is common in Japanese discussions of modern relationships.
最近、結婚せずにコハビテーションを選ぶカップルが増えている。
Recently, more couples are choosing cohabitation without getting married.
同棲 is the native Japanese term for cohabitation, more commonly used in everyday conversation. コハビテーション is a loanword often found in academic or formal discussions.
Borrowed from English 'cohabitation'.