The Nikkei average climbed for a fourth day to a two-month high on Monday on growing expectations that Japan's main opposition party will win next month's election and step up pressure on the central bank to ease monetary policy.
A call by Liberal Democratic Party (LDP) leader Shinzo Abe for the Bank of Japan to further stimulate the ailing economy by pushing interest rates to zero or below zero has weakened the yen and boosted the shares of Japanese exporters.
Bellwethers such as Toyota Motor Corp, Nissan Motor Co and Canon Inc, which had lost ground because of worries over a looming U.S. fiscal crisis and the euro zone's debt problems, surged between 1.4 per cent and 4.5 per cent.
The Japanese currency fell to a near seven-month low against the dollar at 81.59 yen on Monday. A weaker yen allows exporters to earn more when they repatriate overseas earnings, as well as boosting their competitiveness.
The Nikkei advanced 1.4 per cent to 9,153.20, comfortably breaking above its 200-day moving average at 9,074.29 and setting its sights on the next resistance level at 9,200.
The broader Topix also gained 1.4 per cent to 762.16 in heavy trade, with 2.0 billion shares changing hands. The volume was 24 per cent above the daily average for the past 90 trading days.
Analysts said that Japanese stocks may stay strong through the general election set on December 16, but profit-taking may be possible as early as this week because of the pace of appreciation.
"Investors are covering their short positions at fast speed now, but they will probably be asking themselves why only Japanese stocks are rising while their overseas peers are weak. They haven't forgotten problems coming from overseas such as the U.S. fiscal cliff," said Hajime Nakajima, a wholesale trader at Cosmo Securities.
"Until there is more clarity and reality in the political climate after the December election, the market may not hold gains."
The benchmark has rallied 5.68 per cent in the past four sessions, taking its year-to-date gain to 8.25 per cent, slightly ahead of an 8.1 per cent rise in the U.S. S&P 500 and a 7.5 per cent advance in the pan-European STOXX Europe 600 index.
An opinion poll showed on Sunday that the LDP has maintained its lead over the ruling party, strengthening its case to reclaim control of the government in the December election after a three-year absence.
"If the landscape of Japanese politics and monetary policy could be altered by the election, it would be yen negative, equity positive and JGB negative," Bank of America Merrill Lynch said in a note.
Among other gainers, Japan Tobacco Inc jumped 6.5 per cent to a three-month high after the Ministry of Finance said on Friday it would not sell shares in the company before the end of December, removing a short-term overhang on the stock.
Fanuc Corp gained 3.2 per cent to a two-month high after Deutsche Securities raised the factory automation robot maker's rating to 'hold' from 'sell'.
Copyright @ Thomson Reuters 2012