noun
principal of a private school; head of a cram school
Refers to the head or principal of a private educational institution, especially a 塾 (cram school or private tutoring school).
彼は有名な進学塾の塾長を務めている。
He serves as the principal of a well-known cram school.
校長 is the principal of a regular school (elementary, junior high, high school), while 塾長 is specifically for private tutoring or cram schools.
Compound of 塾 (private school) and 長 (head, chief).