累進

1. Origins, structure, and basic meaning

• Structure: Spelling: 累進. Reading: るいしん. Core meaning: progressive taxation.
• Basic usage: Representative examples: 授業では、所得に応じて税率を上げる仕組みを「累進」と呼んで説明した / この資料では「累進」という語を税制の説明に限って用いている.

2. Common pitfalls and similar expressions

• A progressively increasing structure
  • 累進 describes a structure in which a rate rises by stages as a base such as income increases. It is not mere numerical growth; it concerns higher rates applied across brackets.