Story highlights British politician, Boris Johnson knocks over child whilst playing rugby

Ten year-old Toki Seliguchi "felt a little bit of pain" after the tackle

Johnson has a history of mishaps on the sports field

(CNN) One Japanese child will never forget the day he met Boris Johnson.

The London Mayor -- nicknamed "BoJo" -- was in Tokyo on a trade visit when he took part in a game of rugby.

Unfortunately for Toki Seliguchi, Johnson appeared to stumble while running with the ball and collided with the 10-year-old, sending him crashing to the floor before the British politician helped him to his feet.

"We have just played a game of street rugby with a bunch of kids and I accidentally flattened a 10-year-old, on TV unfortunately," the 51-year-old said in a speech to British and American businessmen.

"But, he bounced back, he put it behind him, the smile returned rapidly to his face."

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