Nanboku-chō period
In the Nanboku-chō period, the scholar Gyōa published the "Kanamojizukai" (Kana Character Syllabary, completed in 1363), drastically augmenting the lexicon by over 1000 words. Though the "Kanamojizukai" was generally as widely accepted as Teika's syllabary, in practice there were a number of kana pronunciations that did not conform to it.