Meet Japan's 'Ninja Boy', the prodigy who aims to stun Mayweather

Nasukawa (right) during a press conference in Tokyo to announce his fight with Mayweather. – AFP/Rizin Fighting Federation

TOKYO: (AFP) Japanese kickboxer Tenshin Nasukawa, who aims to make history by defeating boxing superstar Floyd Mayweather Jr, claims his left-hook is like a "bolt of lightning" that will "change the world".

The baby-faced southpaw with a blond quiff, who is only a few months out of his teens, was barely known outside his home country before the shock announcement of his New Year's Eve fight with the unbeaten Mayweather.