For example, the Sekkan-ke (the families which produced regents) (the Northern House of the Fujiwara clan) which worked for Sessho and Kanpaku as a family business, the Kanmu (literally official duty) family (the Ozuki clan) which worked for the Oversight Department of the Grand Council of State as a family business, the Kyokumu (literally bureau duty) clan (the Nakahara clan and the Kiyohara clan) which worked for the duties of Geki (upper secretariat) as a family business, and the Army clan (samurai families) which was in charge in exercising force.
例えば、摂関を家業とする摂関家（藤原北家）、弁官事務を家業とする官務家（小槻氏）、外記事務を家業とする局務家（中原氏・清原氏）、武力行使を担当する兵の家（武家）などがある。