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Go Mifune
The central character in the anime and manga was a young race car driver named Gō Mifune (Mifune Gō). The name of the series, Mach GoGoGo has a triple meaning: "Mahha-gō" (マッハ号) is the name of the car; the name of the main character is Gō Mifune; and finally, it contains the English word "go".