Tokyo, Oct. 21 -- Asian shares were mixed Monday amid uncertainties about Britain's exit from the European Union and the ongoing trade conflict between the US and China.

Japan's benchmark Nikkei 225 gained nearly 0.3% in early trading to 22,548.07. South Korea's Kospi picked up 0.2% to 2,065.68, while Hong Kong's Hang Seng added 0.2% to 26,778.99. The S&P/ASX 200 in Australia lost 0.1% to 6,640.40, while the Shanghai Composite slipped 0.1% to 2,934.30.

Shares fell in Taiwan and were mixed in Southeast Asia.

British Prime Minister Boris Johnson is trying to win over rebellious lawmakers in time to meet the Oct. 31 Brexit deadline for the UK's exit from the 28-nation European Union.

A vote over the weekend ended with an amendment that d...