From: PDX (and now) London, UK
For first level it is not that hard. 3 Engineer units, and few thousand of supplies, and you have port in around 5 weeks.
When you say three engineer units, I wonder what you mean. The Japanese engineer units are not quite the same as the Allied.
It would be nice to try and save it, but I could do all of that, spend thousands of supply, and he could spot it and send a port strike and sink it after two months of work. Good to know, but isn't worth it in this situation.
I will do a test though. I had it in my brain that it was too difficult and cost prohibitive as Japan to build 0 level anything, so now you have me curious.
"Success is the ability to go from one failure to another with no loss of enthusiasm." - Winston Churchill