At Lisburn, the Jersey star – chasing a world top 16 ranking to qualify for the Beijing Olympics – won in straight sets against an opponent who was top seed in the tournament and currently ranked 23rd in the world.
Cann, who was playing in her third final of the season – following narrow defeats in Glasgow, a fortnight ago, and in Belgium in September – won 21-19, 21-9.
Ranked two in Lisburn and currently 39th in the world, Cann said: ‘I’m very pleased to have won.
I played well in the latter stages but the first few rounds were scrappy and I managed to get through.
‘Mori is a top Japanese player and at the start I did not know what to expect.
Japanese players are very fit and although I was behind at the start once I got the pace of the game I got back to win the first in the latter stages.
‘I was really surprised to win the second so easily and obviously overall I’m delighted.’
Cann also had the satisfaction of defeating Scotland’s Susan Hughes in the semi-finals; Hughes defeated Cann to win the bronze medal in the Commonwealth Games in Melbourne, Australia, last year.
Cann added: ‘Susan had beaten me twice since the Commonwealth Games so I was determined to get my head down and do the job this time.
It was a good win and a success long overdue.’
Cann trailed 20-17 before recovering well to win 22-20, 20-17 against the third seed.
In earlier rounds Cann beat Lithuania’s Akville Stapusaltytem 21-13, 22-20 and Denmark’s Trine Niemeier 19-21, 21-14, 19-7 after Niemeier retired in the third.
Cann’s international title was her third, the twice National champion having won in Sweden in January 2005 and in Bulgaria in September 2004.
Cann leaves England tomorrow to play in the Italian Open.
Following the Italian competition Cann will visit Malaysia and Korea before defending her National title in Manchester early in February.
