懸案

1. Origins, structure, and basic meaning

• Structure: 懸案 (けんあん) is a noun for a pending issue or unresolved matter that still requires consideration.
• Basic usage: It identifies a long-standing problem or unresolved matters discussed at a meeting.
  • 長年の懸案だった橋の修理が始まった。 — Repairs began on the bridge, which had long been a pending issue.
  • 会議では二つの懸案について意見を交わした。 — At the meeting, we exchanged views on two unresolved matters.

2. Common pitfalls and similar expressions

• Agenda topic and unresolved issue
  • 議題 is a topic placed on a meeting agenda, whereas 懸案 emphasizes a problem that remains unsettled.