That tanuki suit has balls.

i always wondered where that ball thing came from

Wait, what?

I wouldn't trust anyone other than a giant-balled tanuki to build my house.

Tanuki balls also make excellent weapons.

I'm ashamed that I actually understand the context.

The play on words comes when she sings "Your heart will swell with pride."

The word for 'heart' is the same as for 'chest' in Japanese, hence the giant tits out of nowhere.