noun
assistant chief of staff, G3
A specific military staff position, primarily used in the context of the Japan Self-Defense Forces. Equivalent to an assistant chief of staff in charge of operations (G3).
彼は防衛部長として作戦計画を統括している。
As the assistant chief of staff (G3), he oversees operational planning.
Compound of 防衛 (defense) + 部長 (department head), referring to a senior staff role in defense organizations.