“Whole family” in Japanese
Short answer
Whole family in Japanese is “家中” (kachuu). Full meaning: whole family, entire family, all (members of) the family; all over the house, throughout the house; retainer of a daimyo, feudal domain, clan.
Other ways to say “Whole family” in Japanese
家内中
kanaijuu whole family, all the members of one's family
家族一同
kazokuichidou whole family, all one's family
一家全滅
ikkazenmetsu entire family is affected (disease, etc.), whole family
一家
kazuya a family, a household, a home, one's family, whole family; (one's own) style, school; gang, (yakuza) family
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