I haven't had a caption contest in quite some time, and I thought this photo was just begging for one. The actual caption from Agence France-Presse says that they're university sumo students and they're participating in the Baby-Cry Sumo at a local Buddhist temple. Apparently the goal is to get the babies to cry, and that somehow brings good health.
The winner will receive a small original watercolor painting by me. :) Contest closes on Wednesday evening at midnight, and the winner will be announced on Friday morning.