Media reports indicate that the Natchan World, a high speed ferry designed and built by Incat Australia, was used to transport tanks and other military vehicles, for a Japanese Self-Defense Force exercise in November 2011. The Natchan World, operated by the Tsugarukaikyo Ferry Company, is very similar in design to the HSV-2 Swift operated by the US Navy. The Natchan World, loaded Type 90 tanks and Type 89 infantry combat vehicles, via the stern ramp (the ramp on the Incat ships can swivel around to load from either side).
Another Australian company, Austal, is making the Spearhead class Joint High Speed Vessel (JHSV), for the US Department of Defence. Unlike many military projects, these ships have been very successful, as they use already proven civilian technology, with minor changes for military use.