Airfield Matting
The Allies and Japanese both devised ways to deal with the rough conditions of forward airfields in the Pacific and tropics, that were constantly plagued by enemies other than the enemy: torrential rains, drainage problems and soft or unstable ground.

US Army PSP (Periced Steel Planking) "Marston Mat"
The pierced steel plank (PSP) or Marston Mat was developed during World War II and was widely used in every theater of operations. Though rigid enough to bridge over small surface inqualities of the ground, it was used to best effect on stabilized subgrade. This combination provided an adequate semi-permanent runway.

Some conception of the logistics problems of war can be gained from the fact that some 60,000 pierced steel sheets 15 inches by 10 feet are required for a 150 by 5,000 feet runway, weighing nearly 2,000 tons, requiring 35,000 cubic feet of cargo space to be shipped overseas perhaps ten or twelve thousand miles. A runway this size can could be put down in 175 hours by 100 unskilled men.

Nearly every American airfield in the Pacific used "marston matt". Even at larger and more established bases with concrete runways, marston matting was often used on taxiways or even for extra traction on normal roads.

After the war, matting was used again in the Korean war, and even WWII reserves used in that conflict. Numberous exampls of Marston Matt can be found all over the pacific, often still in use to this day for the same purpose, or a variety of other 'new' uses, like fences, truck bed lining, pig-pens, foot bridges and more.

Japanese "Landing Mat" (Tetsuban)
Research by Yohji Sakaida

A construction experiment was done at Mobara City, Chiba Prefecture during 1942 - 1943. A landing, mat was made in Japan was good performance. There were several types: one was called "iron plate paving" another "concrete paving", and a third "iron net paving". The following problem developed at Mobara:  many iron plates couldn't be connected properly, deformation by bombing couldn't be solved and they were short on materials.

Therefore, the Navy and Army did not use it very much, and no improvements were made.  But, the "Iron Net Paving" did not have these problems. No record of its actual usage has been found. Very few examples are know to this day.  The lighter Japanese landing matt appears to corrode much quicker, and any examples left today are flimsy and rusted.