noun
detention pending trial; pretrial detention
Legal term for holding a suspect in custody while awaiting trial. Used in formal and legal contexts.
未決拘留の期間が長すぎると人権問題になる。
If the period of detention pending trial is too long, it becomes a human rights issue.
裁判所は未決拘留の理由を詳しく説明しなければならない。
The court must explain the reasons for pretrial detention in detail.
Compound of 未決 (pending decision) and 拘留 (detention). The term is a direct legal borrowing from the concept of pretrial detention.