Here is the song
By the way, there are many things that make little sense in Japanese.
The literal translation is.

Kagome kagome / The bird in the basket/cage,
When, oh when will it come out
In the night of dawn
The crane and turtle slipped
Who is it in front of behind

The hidden meaning of the song.

Kagome is a star of david believe it or not.
So a bird is within the basket of star of david which means the messiah that the Jewish people have waited so long.
When is this bird aka nobody aka the messiah going to take off the skys and roam the world?

The crane and the turtle are husband and wife.
They slipped but in Japanese characters slipped means ruled.
Husband and wife as one ruled the Earth.

Who is it in front of behind
means who is this messiah?aka nobody.

[link to en.wikipedia.org]