Pop superstar Justin Bieber made a surprise visit to an orphanage in Japan on Wednesday (23Apr14).

The 20 year old is currently visiting the country with his mother Pattie Mallette, and decided to take time out of his travels to make the unscheduled stop.

Mallette took to Twitter.com to write, "In Japan and Jb just randomly decided to show up at an orphanage and surprise some kids. So proud"

Bieber also shared a few short Instagram videos of himself running around with the children, giving out high-fives and even dancing with a young fan.

Later that night, he played an intimate acoustic set at Tokyo's V2 Club.

Bieber's orphanage visit came hours after he was criticised for having his picture taken at Tokyo's controversial Yasukuni Shrine, which honours Japan's war dead, including former military leaders who committed mass atrocities across Asia and the Pacific during World War Ii.

The backlash prompted the star to delete the image and issue an apology.

He explained: "While in Japan I asked my driver to pull over for which I saw a beautiful shrine (sic). I was mislead to think the Shrines were only a place of prayer (sic). To anyone I have offended I am extremely sorry. I love you China and I love you Japan."