I'll never know for sure. But it's quite possible. LST's were to have been among the primary targets during the defense of the Japanese mainland (which just happens to make a lot of sense). And my Dad's name was on the roster for that invasion.
Click here for a very detailed monograph titled "The Final Months of the War with Japan: Signals Intelligence, U.S. Invasion Planning, and the A-Bomb Decision." (So far, I've just quickly skimmed through it, but it looks to be pretty informative.