private school run by a scholar at home (historical)
Refers to a type of school in pre-modern Japan, often with some government recognition, where a scholar taught students in his own residence.
In the Edo period, many scholars opened private schools at home to educate young people.
Compound of 家 (house/home) and 塾 (cram school/private school), literally 'home school'. The term is historical and refers to a specific educational institution in pre-modern Japan.