Instead of kissing babies, this politician tackles children.

London Mayor Boris Johnson trucked over a Japanese schoolboy during an informal game of street rugby.

Johnson, who weighs 225 pounds, didn’t hold anything back as he trounced the 10-year-old, knocking them both to the ground.

Luckily the boy wasn’t injured, and said he enjoyed his meeting with Johnson, though he “felt a little bit of pain but it’s OK.”

Johnson posed for photos with the boy after apologizing, and gave him a 2015 Rugby World Cup ball.

The enthusiastic mayor was visiting Tokyo while on a three-day trade mission to Japan.

Japan will host the rugby World Cup in 2019.