noun
training school; training institute
Refers to an institution that trains people in specific skills, such as acting, nursing, or vocational trades.
彼女は声優になるため、養成所に通っている。
She attends a training school to become a voice actor.
塾 is a cram school or private tutoring academy, often for academic subjects, whereas 養成所 is for skill-based training.
Compound of 養成 (training, cultivation) and 所 (place, institute).