London Mayor Boris Johnson sorry for knocking over 10-year-old Japanese boy in rugby game

Mayor of London Boris Johnson knocks over 10 year-old Toki Sekiguchi who was unharmed in the collision, as Johnson participates in Street Rugby tournament with school children and adults from Nihonbashi, Yaesu & Kyobashi Community Associations in Tokyo Thursday Oct. 15, 2015. Johnson is on the final day of his four day trade visit to Japan. (Stefan Rousseau/PA via AP) UNITED KINGDOM OUT (The Associated Press)

Mayor of London Boris Johnson knocks over 10 year-old Toki Sekiguchi who was unharmed in the collision as Johnson participates in a Street Rugby tournament with school children and adults from Nihonbashi, Yaesu & Kyobashi Community Associations in Tokyo Thursday Oct. 15, 2015. Johnson is on the final day of his four day trade visit to Japan. (Stefan Rousseau/PA via AP) UNITED KINGDOM OUT (The Associated Press)

There may have been bruises but there were no hard feelings after London Mayor Boris Johnson knocked over a 10-year-old Japanese boy during a game of rugby.

Sports fan Johnson plowed into Toki Sekiguchi Thursday while thundering down a turf-covered street rugby pitch in Tokyo.

After they both got up, Johnson asked whether the boy was OK before shaking his hand and saying "I'm so sorry."

Later the pair posed for photographs and Johnson gave Sekiguchi a rugby ball.

The boy said that he "felt a little bit of pain," but it had been "enjoyable" meeting the mayor.

Johnson, who is on a trade visit to Japan, said later that he felt "terrible" about the collision.

Last year Johnson knocked over a 9-year-old during a soccer match.