Country eyes - Inakame

… Until this time, gold was generally circulated as a currency by weight. The weight of gold had been 1 ryo = 4 momme 5 bu since the Kamakura period, and as the use of gold spread, this weight system came to be called Kyome, and in the provinces, the inakame system was established, with 4 momme, 4 momme 2 bu, etc. being 1 ryo. In the late 16th century, this was changed to 1 ryo = 4 momme 4 bu, mainly in the Kinai region, probably due to the convenience of using the four-based system of ryo, bu, and shu in conjunction with the kan momme system. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…　このころまで金は一般に秤量貨幣として流通した。金の量目は鎌倉時代から1両＝4匁5分が行われ，金の使用が広まるにつれこの量目法を京目と呼び，地方に4匁，4匁2分などを1両とする田舎目が行われた。16世紀後期に畿内中心に1両＝4匁4分に改まったが，両，分，朱の四進法と貫匁法を併用する便宜からであろう。…

※「田舎目」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