委細

1. Origins, structure, and basic meaning

• Structure: 委細, read いさい, is a noun for detailed circumstances or particulars.
• Basic usage: It appears in written notices and formal replies; 委細承知 expresses understanding of the particulars.

2. Common pitfalls and similar expressions

• Tone compared with 詳細
  • 詳細 is widely used for detailed information in notices and explanations. 委細 is especially associated with formal documents and set expressions.