[1] The Irop'a is named in official Korean lists of textbooks for Japanese dated 1430, 1469 and 1707.
This copy was in the collection of Kanbara Jinzō, president of Kagawa University, and first publicized in 1959.
[3] The work begins with four forms of the Japanese syllabary, each in the order of the Iroha poem: hiragana, two forms of mana (cursive Chinese characters), and katakana.
[3] The hiragana syllabary is followed by Hangul transcriptions of 16 Japanese words, represented by Chinese characters: 京 'capital', 上 'above' and the numerals 1 to 10, 100, 1000, 10,000 and 100,000,000.
[9] Following the syllabaries is a brief summary of the Japanese writing system, written in Chinese.