As the economy recovered, labor costs rose. There were fewer and fewer young men desperate enough to take jobs as Diggers in the Tunnel. Progress on the American side had slowed for a few years, and Japan was not doing much better. Even China seemed to run out of poor peasants who wanted this work.

Hideki Tōjō, Army Minister, came up with a solution. The Imperial Army’s pacification of the Communist rebellions supported by the Soviet Union in Manchuria and China resulted in many prisoners. They could be put to work, for free.

The prisoners were brought into the Tunnel to take the place of regular work crews. As shift supervisor, I managed them with the aid of a squad of soldiers. The prisoners were a sorry sight, chained together, naked, thin like scarecrows. They did not look like dangerous and crafty Communist bandits. I wondered sometimes how there could be so many prisoners, since the news always said that the pacification of the Communists was going well and the Communists were not much of a threat.