Director Quentin Tarantino was a big fan or the Japanese movie Batoru rowaiaru (2000) aka Battle Royale....so he cast Chiaki Kuriyama (who played Takako Chigusa in Battle Royale... as Gogo Yubari.
Trivia...The character Gogo was originally written as two characters: the twin Yubari sisters, Gogo and Yuki. Gogo had almost no lines and after her death at the hands of The Bride, Yuki would seek her out, only to be killed as well, in the "lost" chapter "Yuki's Revenge". All of Gogo's dialogue in the final film would have been spoken by Yuki.
Additional Trivia...Gogo Yubari is not a real Japanese name. "Gogo" derives from Mach GoGoGo (aka Speed Racer), a Japanese anime that Quentin Tarantino liked when he was young. Yubari is the name of a small town in Hokkaido, northern Japan, that is famous for melons and film. Tarantino's first visit to Japan was to showcase Reservoir Dogs (1992) at the Yubari International Fantastic Film Festival. When Tarantino planned to cast Gogo and Yuki Yubari, his first choices were Chiaki Kuriyama and Kou Shibasaki. Both had roles in the 2000 hit, _Batoru Rowaiaru (2000)_.
More additional trivia....When Chiaki Kuriyama (Gogo) was shooting the scene where she flings her ball and chain out, she accidentally hit Quentin Tarantino on the head while he stood by the camera.