Curia

Japanese: curia

…a member of the Curia, the oldest unit of citizenship in ancient Rome. The Curia was originally a religious group of noble families, which elected a chief and priests and had a place of assembly. The Curia was important in that it was the oldest subunit of the Assembly and the oldest military organization in the country. However, with the rise in the status of non-aristocratic citizens during the Republican period, the Curia lost its national and military significance, and only its religious significance was preserved for posterity.

From the Clan System

...However, on the other hand, it is said that from ancient times the entire people joined the phrateria, not as individuals but through an intermediate subordinate organization, and it can be proven that among the possible subordinate organizations, the ritual groups other than the genos are a relatively later development, and in fact there are groups such as artisans that can be assumed to be remnants of the genos other than the aristocratic class.Therefore, recent historians have considered that if the phrateria was joined by the entire people, the genos was also a blood-related unit group that was original to all Greeks, probably even before the polis.
[Rome]
A similar deduction might be made about the ancient Roman tribus, curia, and genses. According to ancient legend, the Romans were originally formed from three tribes, each divided into ten curias, and each curia into ten genses.

From Rome

...The king's power was not dictatorial but was the "first among equals." The people were divided into three tribes (tribus) based on clans: the Tityes, the Ramnes, and the Luceres. Each tribe consisted of 10 curia. Each curia provided 100 infantry and 10 cavalry.

*Some of the terminology that mentions "curia" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…古代ローマの最古期における市民団編成の単位であるクリアcuriaに属する成員。クリアは本来貴顕氏族からなる宗教的集団であり，首長と祭司を選出し集会の場所を持っていた。国制上の区分におけるクリアは最古の民会の下部単位を成し，また，軍制上は最古の軍隊組織の単位を成していたことで重要である。しかし，共和政期における非貴族系市民の地位の上昇に伴って，クリアは国制･軍制上の意味を失い，宗教的意味だけが後世にも残された。…

【氏族制度】より

…けれども他方，フラトリアには，太古から全人民が，個人としてではなく，中間の下部組織を介して加入していたことが伝えられ，その下部組織としてあげうるもののうちで，ゲノス以外の祭祀的集団は比較的後期の所産であることも証明しうるし，事実手工業者など，貴族階級以外のゲノスの残存と推定しうるものも見られるので，もしフラトリアが全人民の加入したものであるとすれば，ゲノスもまた，おそらくはポリス以前から，すべてのギリシア人に本来的な，血縁的な単位集団ではなかったかという考証が，最近の歴史学者によっておこなわれている。
［ローマ］
　同様の推定は，古代ローマのトリブス，クリアcuria，ゲンスgensについてもいいうるところである。古伝によれば，ローマ人はもと三つのトリブスが集まって形成され，各トリブスは10のクリア，各クリアは10のゲンスに分かれていたという。…