Natsume Sōseki’s Kokoro appeared in 1914, first as a newspaper serial and then as a book. A young narrator’s relationship with a man he calls Sensei eventually gives way to Sensei’s long letter, which changes how the earlier encounters can be understood.
01
How the narration unfolds
Notice who is saying “I”
An illustrated letter and envelope, not a manuscript of Sensei’s testament.Outer cover of the 1914 Iwanami edition of Kokoro, in a monochrome National Diet Library scan. Public domain.
The three parts are titled Sensei and I, My Parents and I, and Sensei and His Testament in common English renderings. The young man narrates the first two; Sensei speaks through the letter in the third. This change determines what the reader can know, and when that knowledge becomes available.
Part
Voice
Information available
Sensei and I
Young narrator
Sensei as encountered
My Parents and I
Young narrator
Family ties and choices
Sensei and His Testament
Sensei’s letter
The past previously withheld
Closeness does not remove secrecy
The young man seeks Sensei’s confidence, while Sensei keeps his earlier life from his wife. The narrator also faces his father’s illness and choices about where he should be. Family ties and friendship provide intimacy without ensuring that one person knows another’s history or intentions.
K confides; Sensei acts first
In the letter, K tells Sensei of his feelings for their landlady’s daughter. Sensei does not admit that he loves her too. He uses K’s own commitment to spiritual improvement against him, then approaches her mother about marriage before K does. The sequence gives a concrete form to the tension between principles and self-interest.
02
Interpretation and the Meiji setting
An explanation that does not settle into one cause
The letter K leaves before his suicide does not name the daughter. Sensei later considers explanations beyond disappointed love, including the difficulty of living up to an ideal and a deeper loneliness. These are the reflections of a troubled first-person narrator. They do not supply a diagnosis or a single confirmed explanation for K’s death.
The end of Meiji enters the letter
Colophon of this edition: printed 17 September and issued 20 September 1914. National Diet Library; public domain.
The deaths of Emperor Meiji and General Nogi become part of Sensei’s understanding of his own ending. Sensei writes while preparing for suicide, telling his recipient that he will already be dead when the letter is read. Public events enter the novel through a character’s private interpretation. That connection helps explain its historical setting, while leaving the fictional letter distinct from a statement by Sōseki about his own life.
03
Publication and later reading
From newspaper to book, classroom and adaptation
The Museum of Modern Japanese Literature displays the opening instalment in the Osaka Asahi newspaper dated 20 April 1914 and material from Iwanami’s first book edition that September. Sōseki designed the book’s binding himself. Later readers encountered Kokoro through school textbooks as well as film and stage adaptations. The museum also follows changes in teaching and research: reception has involved new settings and questions, rather than one fixed interpretation passed down unchanged.
Check your understanding
Does “I” refer to the same person throughout?
No. The final part shifts to Sensei’s voice in his letter.
Does the novel give one definitive reason for K’s death?
No. Sensei considers and revises several explanations.
Is Sensei’s letter Sōseki’s own testament?
No. The character’s account should be distinguished from the author’s biography.
