noun
military band master
Refers to the leader or conductor of a military band. A specific historical or formal role.
彼は陸軍の軍楽長を務めていた。
He served as the military band master of the army.
Compound of 軍 (gun, 'military'), 楽 (gaku, 'music'), and 長 (chō, 'chief' or 'leader').