noun
tutelage; study under a teacher
Refers to the relationship or period of receiving instruction from a master, often in traditional arts, scholarship, or martial arts. Somewhat formal and literary.
彼は有名な画家の師門に入った。
He entered the tutelage of a famous painter.
師門を離れて独立する決心をした。
He decided to leave his master's tutelage and become independent.
Compound of 師 (teacher, master) and 門 (gate, school of thought). The exact historical derivation is uncertain, but the word follows a common pattern for terms related to discipleship and academic lineage.