約款

1. Origins, structure, and basic meaning

• Structure: 約款 is read as やっかん and is a noun for standardized terms and clauses that govern a transaction or service.
• Basic usage: Comparing several sets of terms appears in 約款を読み比べる, while pointing to difficult wording in the terms appears in 約款の難しい表現.

2. Common pitfalls and similar expressions

• Difference from 契約書
  • 約款 focuses on governing clauses rather than the entire contract document.