An interesting gambit by Tehran would be to invite the Japanese Navy to the gulf as a show of both force and flag for de-escalatory global good, and to act as a layer between the rawness of tensions between Iran and the United States.
A single warship bearing the naval ensign of Japan on patrol in the gulf would be a beacon to all parties in various ways.
Unfortunately you're assuming the point is to get hulls cheaply, efficiently and quickly to the war fighters should the need ever arise.
That has very little to do with what the military industrial complex is for. Perpetual low rate production secures jobs and skillsets and greases the money just fine.
Absolutely, with the economic hit being mitigated by sales to those nations that are unable or unwilling to master the economic possibilities.
Good idea in theory, but it misses the fact that some of these waters are disputed.