司る

1. Origins, structure, and basic meaning

• Structure: 司る(つかさどる) means overseeing, governing, or being responsible for a task or domain.
• Basic usage: It is used for a department's responsibilities or the domain governed by a deity in a story.

2. Common pitfalls and similar expressions

• を marks the domain overseen
  • In 安全管理を司る, を marks the work being overseen.
• Verb forms
  • 司る takes forms such as 司っている.
  • In the example, 夜を司っている describes an ongoing role or state of governing the night.