She is a six-time Japan Open champion and she represented her country ten times at the World Masters, where she advanced to the semi-finals in 2022.

One of the most successful darts players from Japan and the first WDF World Cup women medalist from this country.

In the final match they lost 0–4 in legs to Megan Smith and Jannette Jonathan from New Zealand and take the silver medal.

Her first single achievement came a year later during the 2005 WDF World Cup, where she advanced to semi-finals and lost 0–4 in legs to Clare Bywaters, ending the game with a bronze medal.

[2] Her father, Masatami Ōuchi was also a darts player, with some success at the national level in 2003–2007.