The emotional core of "Tokyo Story" is fully realized in its final act, which contains the story's major plot turn: the death of Tomi. After the disappointing and truncated trip to Tokyo, Tomi falls critically ill during the train journey home. She passes away peacefully in Onomichi, surrounded by her eldest children and Noriko, who have rushed to be by her side (her younger son, Keizō, arrives too late).
This event reveals the true depths of the characters' personalities. The selfishness of Shige and Kōichi becomes starkly apparent when they decide to return to Tokyo almost immediately after the funeral. Shige callously asks for her mother's clothes as keepsakes before leaving, a moment that deeply upsets the youngest daughter, Kyōko. This act underscores the theme that for the urban children, pragmatic concerns have completely overridden grief and familial duty.
The film's hidden meaning becomes clear in the final conversations. Kyōko's bitter disillusionment ("Isn't life disappointing?") is met by Noriko's gentle, sad acceptance ("Yes, it is."). This exchange suggests that the film's ultimate message is one of resignation to the painful realities of life. The ending finds Shūkichi alone in his house. Noriko, having stayed behind the longest, must also eventually return to her life in Tokyo. Shūkichi gives her his late wife's watch, urging her to remarry and not end up lonely like him. The final shot is of Shūkichi, alone, fanning himself in the quiet house, a portrait of profound loneliness and the quiet dignity of enduring it. The cycle of life continues, symbolized by a boat passing in the harbor, indifferent to his personal sorrow.