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Also, here are some commercial RF-licensed images that match your search criteria:  
Sumo Royalty Free Stock Photography
Author: Sahua
Sumo mens Stock Image
Author: Sash77
Sumo Stock Image
Author: Eagleflying
Sumo Hippo Royalty Free Stock Images
Author: Wimpos
Sumo Stock Image
Author: Joeygil
Sumo Royalty Free Stock Photography
Author: Joeygil