I recently re-watched Kill Bill Vol. 1 and 2, and noticed the old-school Japanese song that plays during the credits.
Did some Googling and learned that it is “Urami Bushi” by Meiko Kaji. (Life is almost too easy with Google…) Meiko Kaji was a singer and actress and appeared in more than 100 films.
Here is a clip of Kaji Meiko (梶芽衣子) singing Urami Bushi (怨み節) after apparently not singing on TV for more than 20 years. This song, Urami Bushi, was the theme song for the Female Convict Scorpion movie, known as さそり (sasori) in Japanese.
Here is a relatively tame clip from the TV show… It was hard to find. Most are not so tame.
Here is a pretty sweet Meiko Kaji fan Tumblr.