Film adaptation of the hit song

Two brothers run a factory canning crabs. The elder brother Kotaro is righteous and insists on honesty. The younger brother is fixated on money. They are polar opposites. When a boat sails out looking for crab and does not return one day the brothers begin to argue over how to run their facility. They had just received a large order from a foreign country and had obtained a loan from a lender that needed to be repaid.

This film begins with a teacher describing to his students how brave the crew was which died as result of Japan's first submarine accident. The film then follows two of the pupils, one becomes a submarine captain and the other designs submarines.

During the Second Sino-Japanese War, a five-man reconnaissance unit is dispatched to scout enemy positions in a volatile territory. After a sudden and intense firefight, the group is separated, leaving the survivors to wait in agonizing suspense at their outpost.

A group of Japanese soldiers land in Chinese territory. They advance on a village ; one soldier, Norimoto, is killed in the attack, but the village is captured. Norimoto’s body is recovered and buried. Over the next two days, the soldiers advance inland. Two more soldiers, Naito and Takahashi, are injured. They remain behind to recover, but vow to catch up. Their comrades march on...

Tomotaka Tasaka's A Pebble by the Wayside (Robo no Ishi), made in 1938 and taken from a Yuzo Yamamoto novel, takes place around 1902, was about a young boy brought up entirely by his mother since his drunken father is never home. An intelligent teacher wants to send him to middle school, but instead the father apprentices him to a clothing store to which he is in debt. The mother dies and the boy is forced to quit work when his father insults the store owner. Later the boy goes to Tokyo, but only to continue his hardships. First he is forced to do a maid's job at a boarding house and later is used by an old woman to steal at funerals. Finally he is rescued by the teacher, whom he meets in Tokyo.

Minowada, a young teacher at a National People's School, has his own theory of education and the daughter of his linguistics teacher becomes drawn to him. Kayo, a strong-willed doctor, is also attracted to him. A mediator tries to arrange a marriage but just at that point Minowada receives military call-up papers.