internal affairs; domestic affairs
Refers to matters within a country or organization, especially in political or administrative contexts. Often used in compound terms like 内務省 (Ministry of Home Affairs).
The Ministry of Home Affairs is responsible for maintaining domestic security.
He handles all the company's internal affairs single-handedly.
He is in charge of internal affairs for this department.
She has been involved in internal affairs for many years.
内務 covers internal or domestic administrative matters, while 外務 refers to foreign affairs.
Compound of 内 (internal) and 務 (duties, affairs).