端緒|たんしょtansho[1]atamadaka (head-high)

1. nounstart; beginning; first step; clue

• Synonym手がかりてがかりNeutralA clue or lead for solving a problem or cracking a case, as in 「事件の手がかり」. Common in speech, while 端緒 is more written/formal and stresses the beginning of something.
• Synonym糸口いとぐちNeutralA lead or breakthrough toward solving a problem, as in 「解決の糸口」. Close to 端緒 in sense but much more common.
• Synonym足がかりあしがかりNeutralA foothold or stepping stone for further advancement, as in 「海外進出の足がかり」. Stresses a starting point for moving ahead, not the start of the matter itself.
• SynonymきっかけNeutralA chance or trigger that sets something off; the most common everyday choice. 端緒 is more written/formal, mostly for the start of research or investigations.
• SynonymヒントNeutralA loanword for a hint or clue, as in 「クイズのヒント」. Common in everyday speech.
• Related鍵かぎNeutralFiguratively the key to solving something, as in 「成功の鍵」. Points to the crucial factor, not the start.
• Related示唆しさNeutralA subtle suggestion hinting at a possibility, as in 「示唆に富む」. About giving insight, not about beginnings.
• Related暗示あんじNeutralA hint or suggestion, including psychological suggestion; stresses leaving things unsaid, a different sense from 端緒.
• Related手蔓てづるNeutralConnections or personal contacts you can rely on. Focuses on relationships, not the beginning of something.
• Related傍証ぼうしょうNeutralIndirect supporting evidence, mostly in law and academia, also in news commentary. About corroboration, not beginnings.
• RelatedほのめかしNeutralA roundabout hint; stresses what is implied between the lines, a different sense from 端緒.
• Antonym終結しゅうけつNeutralAntonym: the end or settlement of a matter, the opposite of 端緒's sense of beginning.
• Antonym終局しゅうきょくNeutralAntonym: the final outcome or the end of a go or shogi game, opposite to 端緒 as a start.

Use 「端緒」 for the start or first thread of research, events and the like; it is written/formal prose, as in 「端緒を開く」. In daily speech say 「きっかけ」; for clues in a case use 「手がかり」, and for a breakthrough use 「糸口」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 物事ものごとの始はじまり。糸口いとぐち。