正午

1. Origins, structure, and basic meaning

• Structure: 正午, read しょうご, refers to the point in time at twelve o’clock in the daytime.
• Basic usage: It is used to specify an exact departure time or place lunchtime events in a time sequence.

2. Common pitfalls and similar expressions

• Noon and daytime
  • 正午 is the specific point at noon, while 昼 can refer more broadly to daytime or the period around lunch.
• Exact and approximate time
  • 正午ちょうど emphasizes exactly noon. 正午ごろ means around noon, and 正午を過ぎる means passing noon.