Sociological term referring to a family unit that includes relatives beyond the nuclear family, such as grandparents, aunts, uncles, or cousins, often living together or in close proximity.
In Japan, extended families were once common.
The concept of extended family is often used in sociology.
核家族 refers to a nuclear family (parents and children), while 拡張家族 includes additional relatives.
Compound of 拡張 (expansion) and 家族 (family), likely a calque from English 'extended family'.