Kodaira, whose other victory was at last year's Japan Tour Championship, is in his 4th season on the Japan Golf Tour but until today this season was looking to be his worst having missed six of his last seven cuts.
South Australian Adam Bland led the Australians when he put together a very strong weekend to finish tied for 15th.
Stephen Leaney was 27th and Brendan Jones continued his comeback with a final round of 69 to finish 45th.
The Japan Golf Tour now has another three week break before the RZ Everlasting KBC Augusta in Fukuoka.
At the completion of this week's event, New Zealander Michael Hendry leads the Australasians on this year's money list in 22nd position while Brad Kennedy is next best in 31st place.