[Machine Translation] Men who built ships with concrete during the war! During World War II, Japan ran out of steel and built ships out of concrete. The president of Takeda Corporation, who was struggling to find work for his employees, planned to take on military work to protect the lives of his employees amidst the sound of the approaching war. He could not get a job with the military by going door-to-door, but he was approached with one job: to build a "concrete ship. The ship was built by the decision of the president of a private company. On board the ship - life, hope, and ...... prayer. A story based on historical fact that survives the fierce times...!