A version of the Naval Strike Missile, the Joint Strike Missile, is currently under development. The JSM will be capable of both air to ground and anti-ship missions, and will fit the internal weapons bay of the F-35 Joint Strike Fighter. It will also fit a standard 533mm submarine torpedo tube. JSM is scheduled to become operational in 2023.
Kyle Mizokami is a writer based in San Francisco who has appeared in The Diplomat, Foreign Policy, War is Boring and The Daily Beast. In 2009 he cofounded the defense and security blog Japan Security Watch. You can follow him on Twitter: @KyleMizokami.