The Japanese noun '当事 (とうじ)' refers to the 'parties' involved in a particular matter, event, or legal case. It is often used in formal or legal contexts to describe the individuals or groups directly concerned with a specific issue. For example: The parties involved in the dispute reached an agreement「当事者たちは合意に達した」(とうじしゃたちはごういにたっした). The parties to the contract must sign the document「契約の当事者は書類に署名しなければならない」(けいやくのとうじしゃはしょるいにしょめいしなければならない). This term is commonly used in legal, business, and diplomatic settings to specify those directly involved.
![Musical "Fate/Zero" - The Sword of Promised Victory - [Limited Release] [w/ Bonus DVD, ANIPLEX Online Limited Set]](https://www.cdjapan.co.jp/pictures/s/16/34/NEODAI-239577.jpg)
