 Occasionally in songs, such as and "Follow the Nightingale," Kokia writes lyrics in code.For both of these songs, they featured reversed syllables (such as the lyric "nimiunooto denzush," when reversed gives ).In "Chōwa Oto," Kokia also has a separate code (the numbers 3 25 15 21 23 and 1) which correspond to the letters of the English alphabet (1=A, 26=Z) to write the song's name in "wāpuro rōmaji" (C Y O U W A).