Watson has risen 21 places after her triumph in Osaka, and the 20-year-old has admitted that moving into the top 50 of the world rankings was one of her goals for the season.
She told BBC Radio 5 Live: "The top 50 was a goal - it will push me to make harder goals.
"I really wanted to do well this week so I could earn my rest next week because this is my last tournament of the year. I don't think I could have ended it any better.
"I'm excited to have a break but I am looking forward to working hard again because it motivates me to achieve more."
Watson's win in Asia also saw her become British number one ahead of Laura Robson.