With four tournaments left in the LPGA Tour season, Danielle Kang became the 11th player to break the US$1 million (AU$1.46m) mark.

The PGA Tour had 112 players earn at least US$1m last season.

Already nine players have made at least US$1m through six PGA Tour events this season.

Mike Whan brought a different perspective on Tuesday at the LPGA's new BMW Ladies Championship in South Korea.

Prize money for the women is growing at a rate Whan didn't think possible when he took over as LPGA Commissioner in 2010.

It's also growing for the men.

"Not sure if we have closed the gap, even though we are playing for dramatically more money," Whan said.

"When I started, we were playing for just over US$40m (AU$58.4m) and now we're playing for over US$70m (AU$102.1m).

"But the fact is, the men's (prize money) has grown as well. As a result, I don't want to be depressed by that.

"Not sure if we have closed the gap, even though we are playing for dramatically more money.” – LPGA Commissioner Mike Whan

"I think when golf and golf purses are growing for men and women, that's a good opportunity."

The LPGA Tour had 24 events and official prize money of US$41.4m (AU$60.4m) in 2010.

Whan said it had only one tournament with a purse of US$3m (AU$4.4m) or more.

This season, it had 32 official events and US$70.2m (AU$102.4m) in prize money, an increase of 70 percent.

Five tournaments had prize money of US$3 million or more.

The PGA Tour had 46 official events in 2010 and 2019 – and prize money grew from US$310.1m (AU$452.3m) to $413.6m ($A603.3m), including US$60m (AU$87.5m) from the FedExCup and US$10m (AU$14.6) from the Wyndham Reward.

That's an increase of 33 percent.

Whan still has his eye on the gap and knows that closing it will take time.

"I have not had to be too loud about closing the gap because society has taken that banner for me," he said.

"But the reality is we have grown significantly and the gap is about the same."