The Bourget, Ont., native had a hat trick and an assist to lead Canada to an 11-0 romp over Japan on the opening day of the 2012 World Sledge Hockey Challenge.
"I really have to thank my teammates for that," Dorion said. "I call for the puck when I'm in those positions.
"I just hope that my teammates are hearing me right and that they're going to get it to me. Then I just try to get that puck into the net and finish off."
Dorion scored just two goals in the 2011-12 season.
"He's scored big goals in the past," Canadian head coach Mike Mondin said. "It was really nice to see him get off to a good start for sure."
Graeme Murray scored twice, Kieran Block had a goal and two assists, while Billy Bridges chipped in with five assists for Canada.
Brad Bowen and Dominic Larocque each had a goal and an assist during the onslaught, while Adam Dixon, Kevin Rempel and Brendan Blanchard also scored.
Canadian netminder Benoit St-Amand was forced into just two saves to record the shutout.
"Two shots cannot win the game obviously, so we've got to shoot more," Japanese head coach Kojin Nakakita.
Mitsuru Nagase started in net for Japan, but was pulled after allowing eight goals on 11 shots in the first period. Shinobu Fukushima then stopped 14-of-17 shots he faced the rest of the way.
"I think the guys were nervous because we've got a new team going here," Nakakita said. "Give them a little time, but it's too bad in the first period. I think we came back okay in the second period."
Earlier in the day, Rico Roman set up a pair of goals to lead the United States to a 3-1 win over Norway.
Kevin McKee, Josh Sweeney and Declan Farmer scored for the U.S., while Lloyd Remi Pallander replied for Norway.
The four-team tournament will continue Monday at the Markin MacPhail Centre when Canada faces off against Norway in the afternoon before Japan and the U.S. play in the evening.
Against Japan, Dorion and Murray each scored twice in Canada's eight-goal first period.
Dorion completed his hat trick in the second period before Block converted a feed from Tyler McGregor to extend Canada's advantage.
Rempel then rounded out the scoring with the lone goal of the third period.