東口

1. Origins, structure, and basic meaning

• Structure: 東口 (ひがしぐち) is a directional compound noun for an entrance or exit on the east side of a facility.
• Basic usage: 駅の東口で待ち合わせる marks a meeting location, while 東口を出る treats the exit as the route traversed when leaving.

2. Common pitfalls and similar expressions

• Location で and path を
  • 東口で locates the meeting there, whereas 東口を出る describes passing through that exit. The を does not make the exit an object being created or changed.