The conservative Liberal Democratic Party (LDP) of Shinzo Abe has won the Japanese election, exit polls predict.
The LDP, which enjoyed almost 50 years of unbroken rule until
2009, is projected to have an overall majority in the new parliament.
Mr Abe has already served a Japan's Prime Minister between 2006 and 2007.
He campaigned on a pledge to end 20 years of economic
stagnation and to direct a more assertive foreign policy at a time of
tensions with China.
He is seen as a hawkish, right-of-centre leader whose
previous term in office ended ignominiously amid falling popularity and a
resignation on grounds of ill health.
But Japanese media project big gains for his LDP who they say
are on course to win between 275 to 310 seats in the 480-member house.
Its ally, the small New Komeito party, looks set to win about
30 seats to possibly give the alliance a two-thirds majority in the
lower house.
That would give Mr Abe the power to over-rule parliament's
upper house and help to break a deadlock that some say has plagued the
world's third biggest economy since 2007.
The BBC's Rupert Wingfield Hayes says as many predicted, Japan has taken a sharp turn to the right.
The big losers from the election were the outgoing prime minister
Yoshihiko Noda and his Democratic Party (DPJ) which is forecast to win
between 55 and 77 seats.
A party spokesman told Japan's NHK television Mr Noda would
have to resign over the defeat, in which some of the party's leading
figures are projected to have lost their seats.
The DPJ has struggled since coming to power in 2009. Two
prime ministers came and went before Mr Noda as the party struggled to
deliver amid the economic downturn and 11 March 2011 earthquake and
tsunami.
Mr Noda lost over his move to double sales tax, something he said was necessary to tackle Japan's massive debt.
'Abenomics'
By contrast, Mr Abe has promised more public spending, looser monetary
policy, and to allow nuclear energy a role to play in resource-poor
Japan's future despite last year's nuclear disaster at Fukushima.
But neither of the main parties fully convinced voters. Several new parties contested the poll and the right-leaning Japan Restoration Party founded by the mayor of Osaka, Toru Hashimoto. could win as many as 50 seats.
And the nationalist former governor of Tokyo governor, Shintaro Ishihara, whose bid to buy disputed islands provoked a fierce diplomatic showdown with China, may also have won a seat in parliament according to Japanese media.
source: BBC