Stocks in Asia saw broad gains on Wednesday.

Australia's ASX 200 gained 0.14 percent to close at 6,049.8, with most sectors higher.

Shares of the country's largest private education company Navitas ended the trading day higher by 21.84 percent after the company earlier announced it had received a 1.97 billion Australian dollar ($1.4 billion) buyout offer from a consortium.

"Navitas has been going sideways and as a result the share price hasn't gone anywhere," Morningstar analyst Gareth James told Reuters. "A private equity firm can come in and change the strategy, make it growth-orientated, possibly do some M&A and bring it back to the market in a couple of years."

In Japan, the bounced back to close higher by 0.16 percent at 23,506.04 after being in largely flat territory earlier, while the Topix also ended the trading day up by 0.16 percent at 1,763.86, with most sectors seeing gains.

Earlier in the day, data showed that core machinery orders in Japan rose above expectations in August, suggesting possible growth in capital expenditure.

In the Greater China region, the in Hong Kong saw a slight gain to close at 26,193.07.

Over on the mainland, the Shanghai composite saw a rebound, advancing by 0.18 percent to close at around 2,725.84. The Shenzhen composite, on the other hand, declined by 0.147 percent to end the trading day at about 1,383.05.

South Korea's Kospi also closed lower, slipping by 1.12 percent at 2,228.61.