The term Nenshaku means the right to confer a court rank on a person that was granted to chiten no kimi (the Retired Emperor in power) and sangu (the Three Empresses : Great Empress Dowager, Empress Dowager and Empress) in Japan's ancient/early medieval period.
年爵（ねんしゃく）とは、日本の古代・中世前期において、治天の君及び三宮（太皇太后、皇太后、皇后）が保有していた叙位権を指す用語。