I know all that (I was a BM on a flat top). The question was asked about if it could be done with a ship’s systems. It’s be a major beyotch, but it could be done if needed.
HIGHLY agree with the airlift, though. Load up some 46’s and 53’s with the gear and personnel and get to work.
In the time need to even begin configuration if you could possibly make it work a portable could be operational. Believe it or not you can move a 300 ton chill water Air Conditioning plant in the same way. They have them that big portable. Where I worked at it was a twice a year event when the chiller went down. The portable was trucked in on a flat bed.
Remember that Japan tends to be all 50Hz and metric, while we’re 60Hz. When we design with metric, we really design with English units and make metric conversions. Their systems are designed in metric. Much more difficult to interface with our gear. Feasible, but not conducive to immediate action.