The 33 year old Muto won by four shots over Spain's Gonzalo Fernandez Castano, his final round of 63 in the weather shortened event coming despite a final hole bogey.
Muto started the final round four shots behind Fdez Castano but raced to the turn in 30 to establish a winning break.
It was a quiet day for Fdez Castano with just one bogey and one birdie but he did enough to hold on to second position.
Brendan Jones finished with a final round of 68 including a final hole eagle to finish in a share of 5th position and earn Ã‚Â¥6 million. Jones now joins forces with Richard Green in next week's World Cup of Golf in China.
New Zealander David Smail finished 49th and was the only other Australasian to make the cut.
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