改札

1. Origins, structure, and basic meaning

• Structure: 改札 (かいさつ) is ticket inspection or the gate where it occurs. It appears as a meeting place and route crossed.
• Basic usage: Someone waits at a station gate; after showing a ticket, they pass through it.

2. Common pitfalls and similar expressions

• Ticket gate used as a meeting point and boundary crossed
  • 改札で marks an activity setting; route-marking を appears in 改札を通る. The checking act and facility senses overlap.