The Seventh Grand Prix

...In addition to these, there are six unique heads such as Kagekiyo and Shojoyo, which are used for one role and are rarely used elsewhere, and if new heads are added to these, the total number is 24. Tachiyaku heads include Bunshichi, used for the protagonists of tragedies, Kuchiaki Bunshichi, a wicked nobleman, Odanshichi, used in rough historical plays, Kodanshichi, a scoundrel, Kenbishi, a police officer, and Genta, a handsome man. The names of tachiyaku heads are often taken from the names of the roles in which they were performed at the premiere, but in contrast, there are few female heads named after the roles, and there are fewer types. ...

*Some of the terminology explanations that mention "Daidan Nana" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…このほか，〈景清〉〈丞相（しようじよう）〉などの，一役一首で他に流用されることがほとんどない特殊な首が6種，これに新作ものの首を加えると24種になる。　立役首には，悲劇の主役に使われる〈文七〉，悪公家の〈口開文七（くちあきぶんしち）〉をはじめ時代物の荒物に使われる〈大団七（おおだんしち）〉，ならず者の〈小団七〉，武将から町人まで広く使われる〈検非違使（けんびし）〉，二枚目の〈源太〉などがある。立役首の名称は，初演の役名からとられたものが多いが，これに対して女形の首は，役名が付けられたものは少なく，種類も少ない。…

※「大団七」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報