A group of burly diggers from Saitama, north of Tokyo, took home the first prize of USD 840 and a golden shovel after burrowing down a staggering 3.48 metres (11 ft 5 ins) in the allotted time of 30 minutes in Narita yesterday.
The wooden spoon went to the "Red Lantern" B-team, whose official recorded depth was shallower than a worm's hole at just half an inch.
"That was probably because some teams were more interested in art than digging," tournament official Ai Okazaki told AFP.
The 15th edition of Japan's bizarre shovel-a-thon, which is open to fun diggers as well as ultra-serious competitors with clipboards and blueprints, attracted a record number of 305 teams.
Organisers now face the daunting task of filling in all the holes.
"It takes about a week for our staff to gradually refill the holes," said Okazaki, who revealed that the hole-digging championships were held at a Narita campsite, close to Tokyo International Airport, as a means to drum up business during the winter.
Winning is not all that matters: The six young women from northern Japan who went to work with trowels and buckets while sporting fish-shaped headgear and called themselves "Team Salmon" swam away with the best costume prize.
But there was no magic for a group of six dressed as boy wizard Harry Potter, who returned to Yokohama with mud-spattered capes and wands and little else to show for their efforts.
