USAAF strategic targets in Japanese occupied Asia

Were there strategic targets in Japanese occupied Indochina, Korea or Manchukuo that could have been bombed by the USAAF in WW2? I have read the Wiki article about limited bombing of Indochina and Thailand. Manchukuo had some heavy industry in coal and steel. I think northern Korea was more industrialized than the rest of the peninsula. I am wondering if bombers based in China could have damaged more Japanese industry.
 
By the time the B-29s were in a position to bomb Manchurian industries, they were marginally relevant. Furthermore getting fuel and supplies to B-29 bases in China, no matter where the bombers were going, was decided to be a waste of effort, given how many flights it took to support even one B-29 flying a raid. By the time B-29s were operational, the flow of goods/raw materials from Indochina to Japan was quite small, and even shipment of steel and coal from Manchuria was limited. Finally the factories that turned out finished goods - airplanes, guns, ammunition, etc were essentially all in Japan so if they were knocked out anything coming from Manchuria was useless.
 
Based on hindsight from the European bombing experience...

If strategic bombing of Japanese occupied Asia were a option, then the transportation nodes, the ports and rail centers would be the most useful. I am convinced the several anti transportation campaigns in Europe or Tunisia were the most cost effective. So, B29s trying for rail yards, bridges, docks and other port facilities, & most important the ships parked within.
 
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