後嗣

1. Origins, structure, and basic meaning

• Structure: 後嗣（こうし） means an heir who will succeed to a family line or position.
• Basic usage: Use it in formal contexts about the heir to a king or lord in a story.

2. Common pitfalls and similar expressions

• An heir versus a successor more generally
  • 後嗣 is closely associated with succession to a household or family line.
  • 後継者 has a broader range, including someone who takes over a position, business, or skill.