Thin book - Thin book

...It means that the entire work is included as opposed to a single-act excerpt. For all schools of Joruri other than Gidayu (such as Icchu-bushi, Kato-bushi, Tokiwazu-bushi, and Kiyomoto-bushi), there are thin books ranging from 2-3 pages of half-sized paper to about 20 pages, which are called thin book seihon (or simply thin book). In addition, printed versions of the lyrics of Nagauta are also called Nagauta no seihon (Nagauta no seihon).

*Some of the terminology explanations that refer to "thin originals" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…1段だけの抜本に対し作品全部を収めた意である。義太夫節以外の浄瑠璃の各流派(一中節，河東節，常磐津節，清元節など)のものは，半紙本2,3丁のものから20丁ぐらいの薄い本があり，これを薄物正本(単に薄物とも)と呼ぶ。また長唄の詞章の部分を版行したものも長唄の正本と呼ぶ。…

※「薄物正本」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