JAPAN'S Prime Minister Shinzo Abe has vowed to prevail over resistance to his plans for economic and political change following a weekend election victory which gives him up to four more years in power.

In Sunday's snap election, the conservative Liberal Democratic Party that has ruled for most of the post-Second World War era scored a solid majority of at least 291 seats. About 35 seats were claimed by the LDP's coalition partner, the Buddhist-backed Komei party, giving the ruling bloc more than two-thirds of the 475-seat House of Representatives.

That majority could enable the coalition to override resistance in the upper house, but not necessarily the powerful vested interests and bureaucrats opposed to major reforms many economists say are needed to revitalise Japan's economy.

"We are taking the energy, power and support we received from the voters and will firmly and directly proceed ahead," a visibly weary but relaxed Mr Abe said at a news conference. "We still face a mountain of difficult problems that needs to be tackled."

Businesses are reluctant to sink their cash hoards in a shrinking home market, farmers are set on keeping their cushion of subsidies and tariffs, and voters remain wary of many of Abe's plans. The election victory changes none of that.

Japan could gain significantly by boosting its productivity through labour reforms and improving business conditions for foreign companies, but such initiatives have made little headway.

"Don't look for bold new economic reforms," said Gerald Curtis, a politics professor at Columbia University who was in Tokyo. "I think we'll see pretty much more of the same. Labour market reform? I don't see it happening."

The ruling coalition's solid majority - and the four-year span until the next lower house election must be held - does give the rightward-leaning Mr Abe space to move ahead on some of his longer-term political goals. They include revising Japan's pacifist constitution to expand the role of its military and allow restrictions of freedoms such as speech and expression if they are deemed to harm the public interest.

But many Japanese are wary of Mr Abe's nationalistic goals, and a heated debate is expected when parliament is expected to take up the proposals to expand Japan's military role, probably after local elections in April. The public also has qualms about the LDP's desire to restart nuclear plants idled after the March 2011 Fukushima disaster.

If turnout is any indication, Japanese voters are not exactly excited about any of their political leaders. Kyodo news agency estimated voter turnout at 52.7%, a post-Second World War record low and down nearly 7 percentage points from the previous lower house election in 2012.

Mr Abe successfully wagered that voters would stick with him despite the recession and those qualms. He said his top priority remains the economy, which fell back into recession after a tax hike in April. He pledged to draw up a set of stimulus policies before the year's end.

The "Abenomics" blend of aggressive monetary easing, public spending and economic reforms has pushed share prices higher and weakened the value of the yen, helping big exporters like Toyota Motor Corp. But wages and business investment have remained sluggish, and inflation and growth have fallen short of the targets he set when he took office two years ago.

The quarterly "tankan" survey of business sentiment released today by the Bank of Japan showed a slight deterioration in the outlook for coming months. Carried out after Mr Abe delayed a sales tax hike that had been planned for next year but before yesterday's election, it showed businesses anticipate slack demand and rising costs.

"Abenomics is still halfway through, and I feel a strong sense of responsibility to push it further," said Finance Minister Taro Aso, who retained his seat in parliament.

Mr Abe's agenda includes labour market reforms and securing a trans-Pacific trade agreement that is strongly opposed by the powerful farm and medical lobbies.

He acknowledged it will take a strong "political will" to reform the farm sector and pushing through deregulations to facilitate growth of new industries.

"People need to see that this will open up the future," he said.

Mr Abe has lobbied for a stronger role for women in both government and business, in part to make up for the decline in its work force as the baby boom generation retires. But in a country where gender equality remains more theory than reality, he can get only so far.

"Whatever his intentions and objectives are, what the prime minister can do to change the culture of Japanese corporations and the society generally is limited," Prof Curtis said.

The Liberal Democrats held 295 seats before the election, and fell short of forecasts that they could win as many as 320 seats.

The main opposition party, the Democratic Party of Japan, won 73 seats - a stronger showing than many had expected. But the party's leader, Banri Kaieda, resigned after he lost his seat and the party remains weak and in disarray after it lost power in 2012.

The Japan Communist Party, a traditional protest vote option, nearly tripled its seats to 21, while another opposition party, the Innovation Party, took 41 seats.

"I believe the results show that we have received a public mandate for the Abe administration's achievement over the past two years," Mr Abe said in a live television interview with Tokyo Broadcasting System. "But we should not be complacent about the results."

In Washington, the White House congratulated Mr Abe on his election victory, calling the US-Japan alliance "the cornerstone of peace and prosperity in the Asia-Pacific".

The White House statement expressed appreciation for Mr Abe's "strong leadership" on a wide range of issues from typhoon relief in the Philippines to the Ebola response and the international fight against the Islamic State group.

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