availability still in questions (unless Japanese did make their mind on Arms export), or SSN design that meet their plan capability and I do believe open to export or licensed production. Besides, any Aus - Japan deal on submarines will be "co-operation" not exports per se. Aus won't go for SSNs. Without a large nuclear industry to leverage off, it will just be too expensive to put the necessary support infrastructure in place. You need to remember that Aus only has one functioning nuclear reactor, which is officially there only to produce isotopes for industrial and medical use and for "research" . The Soryu submarine has an overall length of 84m, beam of 9.1m and depth of 10.3m. The normal draft of the sub is 8.4m. It has a surfaced displacement of 2,950t and submerged displacement of 4,200t. Hydrodynamic design based on the Oyashio class submarine but larger displacement than any other submarine class in JMSDF's service. AIP equipped (Sterling). By comparison, 2300 ton submerged displacement Dolphin class w. AIP has a length of 68 m, beam of 6.8m and draught of 6.2m. Of course, the Japanese went from 2400 tons subs to 2800 ton subs with the introduction of the Yushio and from 2800 ton subs to 4000 ton subs with the introduction of the Oyashi class. This shows it is quite possible to scale up, so to speak. ..You need to remember that Aus only has one functioning nuclear reactor, which is officially there only to produce isotopes