城門

1. Origins, structure, and basic meaning

• Structure: 城門 is read じょうもん and means the gate providing entry to a castle.
• Basic usage: It is used for a soldier closing the gate and for looking over a town from above it.

2. Common pitfalls and similar expressions

• Closing the gate
  • 城門を閉じた describes closing the castle gate.
• Above the gate
  • 城門の上 refers to the top of the castle gate from which the town was viewed.