Tomohide Gomi has written:

'Kodai waka' -- subject(s): History and criticism, Japanese poetry, Waka

It could mean 'youth' which plus 'i' in the end makes 'wakai' means young. Also could mean a child, kid (usually waka mono). In addition to that sense, 和歌 (waka) is a title of a sort of classic Japanese poetry.

En Watada has written:

'Manago no kokoro' -- subject(s): Japanese poetry, Translations into English, Waka

Tetsuo Kuboki has written:

'Ori no bungaku' -- subject(s): History and criticism, Waka, Japanese poetry

Shakira song Waka Waka mean that inconswelo.