Australia leans toward buying Japan subs to upgrade fleet -sources

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By Tim Kelly and Nobuhiro Kubo

TOKYO, Sept 1 (Reuters) - Japan and Australia are leaning towards a multibillion-dollar sale by Tokyo of a fleet of stealth submarines to Canberra's military in a move that could rile an increasingly assertive China, people familiar with the talks said.

An agreement is still some months away, three people said, but the unprecedented sale of off-the-shelf vessels based on the Japanese Maritime Self-Defence Force's Soryu class sub is emerging as the likeliest option.

Such a deal would signal a major expansion of Prime Minister Shinzo Abe's controversial drive for a more active military after decades of pacifism. Rival China regularly accuses Abe of reviving Japan's wartime militarism.

Australia is eager to get the quiet-running diesel-engine subs from Japan, despite the political backlash that would follow from abandoning a government pledge to build the vessels at home, said a person with knowledge of Canberra's thinking.

"It is the best option out there," said the source.

Abe and his Australian counterpart Tony Abbott agreed in July to "enhance our security and defence cooperation", including the transfer of military equipment and technology.

Discussions have since moved rapidly from engine-technology transfer to a full build in Japan, with the goal of replacing by the 2030s Australia's six outdated Collins-class boats with 12 scaled-down versions of the 4,000-ton Soryu, the world's biggest non-nuclear subs.

"Discussions between Japan and Australia are gathering pace," one source said.

For Abe a deal, which could come as soon as January, would send a strong signal that Japan will be less constrained by its pacifist Constitution. He has already this year loosened curbs on arms exports, ended a ban on defending friendly nations and reversed a decade of military-spending cuts.

Selling a fleet of subs would mark the first time since at least the end of World War Two that Japan had sold a complete weapons platform overseas.

SHIFTING DEBATE

Bulk orders for Japanese arms makers would help bring down weapons-procurement costs for Tokyo, which has the biggest debt burden in the industrial world.

For Canberra, the sale would avoid the costs and risks of developing a homegrown champion from scratch, after the locally made Collins-class subs were panned for being noisy and easily detected.

A state-owned shipyard in the South Australian capital of Adelaide would handle maintenance and overhaul, which can cost as much as the purchase price over the life of the fleet.

Options under discussion run from working jointly to develop the technology, to Australia importing the engines and building the rest, to building the fleet in South Australia under licence from Japan, to - most controversially - Canberra buying finished subs designed and built by Mitsubishi Heavy Industries Ltd and Kawasaki Heavy Industries Ltd, the sources said.