Japan to submit plan to Canberra to jointly develop Aussie subs


NOV 27, 2015

The government endorsed at a National Security Council meeting Thursday a proposal to jointly develop submarines for the Australian navy, government sources said.

The proposal, which includes an option to build the submarines in Australia, will be submitted to Canberra on Monday, the deadline set under the competitive evaluation process that also includes Germany and France, the sources said.

If successful, it would be Japan’s first full-fledged export of weapons since the country eased its nearly half-century ban on defense equipment exports in April 2014.

Australia is expected to decide next year on which country to team up with for what it calls the “largest defense procurement program in its history.” It plans to build up to 12 submarines, setting aside an estimated 50 billion Australian dollars ($36 billion).

According to the sources, the Japanese government affirmed at the meeting that it can export submarine technology to Australia, which will entail the transfer of highly confidential information, in light of its new defense equipment export policy.

The government also expects the possible tie-up with Australia to benefit Japan amid China’s growing maritime assertiveness in the region.

The Defense Ministry has not unveiled the details of the information to be passed on, but the proposal is expected to be based on the Maritime Self-Defense Force’s Soryu-class diesel-electric submarines that have highly advanced stealth capabilities.

Original post japantimes.co.jp


Soryu Class 

The Sōryū-class submarines (16SS) are diesel-electric attack submarines that entered service with the Japan Maritime Self-Defense Force in 2009. The design is an evolution of the Oyashio-class submarine, from which it can most easily be distinguished by its X-shaped tail planes. The Sōryūs have the largest displacement of any submarine used by post-war Japan.

It is Japan’s first AIP submarine. The class are fitted with air-independent propulsion based on Kockums stirling engines license-built by Kawasaki Heavy Industries, allowing them to stay submerged for longer periods of time. Some recent information suggest that the last units in the series will have their air independent propulsion systems replaced with banks of Li-Ion batteries.

  • Surfaced: 2,900 tonnes (2,854 long tons)
  • Submerged: 4,200 t (4,134 long tons)
  • Length 84.0 m (275 ftin)
  • Beam 9.1 m (29 ft 10 in)
  • Draught 8.5 m (27 ft 11 in)
  • Range 6,100 nm @ 6.5 knots
  • Weapons

Air-independent propulsion based on Kockums stirling engines


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