What an early mining campaign against Japan would require

How quickly could an early Allied mining campaign cut Japan's supply lines?

There is no fixed timetable; success would require many submarine and aerial minelayers, large mine stocks, and sustained operations at long range.

There is no fixed time for cutting Japan's supply lines because success depends on the scale and effectiveness of the campaign. The Allies would need many minelaying submarines, aircraft able to lay mines, and a very large stock of weapons. Those forces would then have to reach and repeatedly operate close to Japan. Basing, range, delivery capacity, and the effort needed to keep fields effective matter more than the mine itself.