family council; family company
Refers to a gathering or organization of people from the same clan or family group. Can mean a formal family meeting (council) or a family-run business entity, depending on context.
Once a year, we hold a family council and relatives gather.
That company is a family company, and all the presidents are from the same clan.
Compound of 同族 (どうぞく, 'same family/clan') and 会 (かい, 'meeting/association').