also: おさむるつかさ
noun
Ministry of Civil Administration
Historical term for one of the eight central ministries under the ritsuryō system; handled matters related to ceremonies, foreign affairs, and noble families.
See also: 律令制
治部省は律令制のもとで外交や儀式を担当した。
The Ministry of Civil Administration was in charge of diplomacy and ceremonies under the ritsuryō system.
The ritsuryō system was the historical legal and administrative framework under which 治部省 operated.
From the kanji 治 (govern) + 部 (department) + 省 (ministry), following the naming pattern of the eight ritsuryō ministries.