嫡系

1. Origins, structure, and basic meaning

• Structure: 嫡系(ちゃっけい) denotes the line regarded as the legitimate or principal lineage of a family or tradition.
• Basic usage: It is used for family succession and lineage relationships described in old documents.

2. Common pitfalls and similar expressions

• The main line and the branch 傍系
  • 傍系(ぼうけい) is a branch apart from the principal line. The example's 嫡系と傍系 contrasts the recognized main succession with its collateral branches.