You wouldn't want to get on the wrong side of these fellas but it seems they're all bark and no bite after pictures show the sumo students having paddies in their nappies.
The sumos were throwing more strops than moves at the National Children's Sumo tournament in Tokyo, which took place on Sunday.
In another shot one tike proves size really doesn't matter as he saunters out of the ring leaving a considerably larger tot sprawled on the floor.
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The pictures show although these students may look pretty big, they've still got a lot to learn when it comes to being a good loser..