Right sleeve - Ujin

…In Japan, depending on the shape of the neckline, round neckline was called agekubi and cross neckline was called tarikubi, but in China and Korea, it was further divided into different types such as kyoryo, jikuryo, enryo, danryo, koryo, and tairyo. The collar of the tarikuryo is crossed and beaten in a V shape, but when worn with the left okumi over the right when viewed from the front, it is called ujin (right front) (the okumi is on the right hand side), and vice versa, sajin (left front).…

*Some of the terminology explanations that mention "right hem" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…日本の衣服は襟ぐりの形によって，丸首型を盤領（あげくび），交差型を垂領（たりくび）と称したが，中国や朝鮮ではさらに細かく分けて，曲領，直領，円領，団領，交領，対領などの区別がある。垂領の襟はV字状に交差させ打ち合わせるが，自分からみて左の衽（おくみ）を右の上に重ねる着方を右衽（うじん）(右前ともいう。右手側に衽がくる)，その逆を左衽（さじん）(左前)という。…

※「右衽」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