1.
to govern, to administer, to be in charge of, to preside over
To have official authority and responsibility over a particular function, domain, or area. Often used for formal, institutional, or physiological roles.
脳は身体を司る。
The brain governs the body.
裁判所が司法を司る。
The courts administer justice.
この部署は会社の財務を司っている。
This department is in charge of the company's finances.
COMMON COLLOCATIONS:
- 司法を司る (administer justice)
- 財政を司る (oversee finances)
- 運命を司る (govern fate/destiny)
- 記憶を司る (control memory — of a brain region)
USAGE NOTES:
A somewhat literary and formal verb. In everyday conversation, 担当する (be in charge of) is more natural. 司る is preferred in formal writing, scientific descriptions (especially about brain functions and physiology), legal/governmental contexts, and literary or mythological contexts (e.g., a god who governs the seas).