曹長

1. Origins, structure, and basic meaning

• Structure: 曹長, read そうちょう, denotes a noncommissioned sergeant rank that trains recruits and helps lead a unit.
• Basic usage: It names a sergeant in a story who trains recruits and explains a unit’s route.

2. Common pitfalls and similar expressions

• Military rank rather than workplace superior
  • It is a specific noncommissioned military rank, not the general word for a superior at work.