勾留

1. Origins, structure, and basic meaning

• Structure: 勾留 is read as こうりゅう and is a noun and する verb for holding a suspect or defendant in custody during legal proceedings.
• Basic usage: Court authorization appears in 裁判所が勾留を認める, while being held appears in 勾留されている.

2. Common pitfalls and similar expressions

• Custody within legal proceedings
  • It is a legal form of custody connected with court and criminal procedure, not an everyday expression for briefly holding someone.
• Difference from 拘束
  • Compared with restraint or restriction in general, this word specifically denotes physical custody in a legal process.