Based on the loosely autobiographical novel of the same name by Toko Kon. Ken Yamanouchi stars as Togo Konno, the titular incorrigible.

A young man with a strong sense of justice is torn between two girls: the flighty Taneko and the serious Suzuko. With wisdom, courage and honor in a Japanese spirit of manliness he wins the day.

1864. Samurai Shinbei is sent in a secret mission to Ezo, in the North of Japan, to stop riots of villagers commanded by Jirozaemon. A Russian count's daughter, the village leader's daughter and a secret treasure add up to the adventure.

Zatoichi comes upon the town of Tonda, overrun by gangsters. Using one of his favorite techniques, Zatoichi proceeds to win 8 ryo in a rigged gambling game. Of course, the local gangsters attempt to kill him, and the adventure begins. It turns out a blacksmith named Senzo examines Zatoichi's cane sword, and discovers it to be forged by his old mentor. Senzo discovers the sword is at the end of its usefulness and will break when it is used next.

Ichi is staying at an inn when a woman dies. Her dying wish is that Ichi take her son to his father, an artist living in a nearby town. After arriving in the town, Ichi finds out that the father has been forced by a local boss to create illegal pornography to pay off his gambling debts. Ichi makes it his mission to save the man and reunite the family, even though it brings him into conflict with a samurai he sort of befriended on his way to the town.

In 1939, Sakura Nishi is a young army nurse who is sent to the field hospitals in China during the Sino-Japanese war. She has to assist the surgeon Dr. Okabe with an incredible number of amputations. In the crowded wards, she gives sympathy to some of the soldiers, including sexually servicing one who has lost both arms and has no hope of returning home. She falls in love with Dr. Okabe, and follows him to the front, even though he is impotent from his morphine addiction.