Yep. A couple of mounted .50 calibers would put an end to this nonsense once and for all. Machine gun the wheel house, then the waterline, pick up any survivors and bring 'em back to Japan for trial.
Personally though, I'm opposed to leaving any survivors at all.
"If a thief be found breaking up, and be smitten that he die, there shall no blood be shed for him." (Exodus 22:2)
{KA-BOOM... glub... glub... glub}