Asia shares mixed as investors eye UK PM's Brexit speech
Qilai Shen | Bloomberg | Getty Images · CNBC

Asian markets traded mixed on Tuesday, as investors remained cautious ahead of British Prime Minister Theresa May's speech on Brexit plans due later in the global day, as well as President-elect Donald Trump's inauguration stateside at the end of the week.

In her speech, May is expected to outline plans for the United Kingdom's plans to exit the European Union. On Monday, the British pound fell to three-month lows , following local media reports that suggested May will announced a "clean" and "hard" Brexit, pulling the country from the European market and the European customs union, in exchange for the ability to control immigration laws and leave the jurisdiction of the European Court of Justice.

"The PM is expected to walk a fine line between providing enough information on the government's intentions, without necessarily showing too much of Britain's negotiating hand ahead of official discussions with the EU," said Rodrigo Catril, a currency strategist at the National Australia Bank, in a note.

The pound (: GBPUSD=) traded at $1.2046, up slightly, as of 10:28 a.m. HK/SIN on Tuesday. The euro gained against the pound, with the pair up 0.11 percent at 0.8803.

Japan's Nikkei Stock Average (Nihon Keizai Shinbun: .N225) traded down 0.50 percent, retracing some of its earlier losses of near 1 percent, while the Topix (Exchange: .SPTPXN) index slipped 0.66 percent.

The yen (: OSEJPY=) traded at 114.12 at 10:26 a.m. HK/SIN, retreating from an earlier session high of 113.81, but climbing from levels above 116 to the dollar in the previous week on safe haven demand.

"The yen was driven on the back of risk aversion as outsized movement on pound/yen was the primary driver," explained Stephen Innes, a senior trader at OANDA, in a note. "There has been less focus on the dollar/yen pair after last week's hefty position clear out."

The pound/yen cross fell from levels above 140 in the previous week to about 137.47 on Tuesday morning Asia time.

The currency's relative strength kept major Japanese exporters under pressure. Shares of automakers Toyota (Tokyo Stock Exchange: 7203.T-JP) dropped 0.50 percent, Nissan (Tokyo Stock Exchange: 7201.T-JP) was up 0.22 percent, after reversing losses of 0.6 percent, and Honda (Tokyo Stock Exchange: 7267.T-JP) was off by 1.07 percent, while electronics maker Sharp (Tokyo Stock Exchange: 6753.T-JP) fell 2.01 percent.

Across the Korean Strait, the Kospi (Korea Stock Exchange: .KS11) bucked the downward regional trend to climb 0.57 percent.