端緒

1. Origins, structure, and basic meaning

• Structure: 端緒 is read as たんしょ and is a noun for a clue, opening, or starting point that initiates an investigation, study, or development.
• Basic usage: A starting point appears in 調査の端緒となる, while opening a path appears in 研究の端緒を開く.

2. Common pitfalls and similar expressions

• Clue and starting point
  • It focuses on what starts an investigation or new activity rather than necessarily proving the matter by itself.
• Difference from きっかけ
  • きっかけ is the everyday word for an occasion or trigger; 端緒 formally marks the opening of an investigation, study, or change.