1908 February Born in Matsue City. Moves with his family to Iishi-mura (now Mitoya-cho), Iishi-gun, Shimane Prefecture.
1920   Enters Matsue Middle School.
1925   Enters Matsue High School.
1928   Enters Nagasaki Medical College.
1930 March 29 Mother (Tsune) dies.
1932 March Graduates from Nagasaki Medical College. Suffers an acute infection of the middle ear.
Assumes the position of assistant in the Physical Rehabilitation Department (specializing in radiology) at Nagasaki Medical College.
1933 February 1 Enlists in the Hiroshima Infantry Regiment and proceeds to China after the Manchurian Incident.
1934 February 1 Returns to his position at Nagasaki Medical College.
  June Becomes a Catholic and takes the baptismal name Paul.
  August Marries Midori Moriyama.
1937   Assumes the position of lecturer at Nagasaki Medical College.
  July Recalled for military service in the war with China.
1939 February 4 Father (Hiroshi) dies.
1940   Returns to Japan and assumes the position of assistant professor at Nagasaki Medical College and chief of the Physical Rehabilitation Department.
1944   Receives a doctorate in medicine.
1945 June Found to be suffering from leukemia and given three years to live. White blood cell count is 108,000 (normal 7,000) and red blood cell count in 300 (normal 500).
  August 9 Exposed to the atomic bombing and suffers a severed artery on the right side of his head.
  August 11 Retrieves his wife's ashes from the ruins of their home.
  August 12 Forms a relief team at Mitsuyama-machi and cares for 125 sufferers of atomic bomb disease.
  August 15 The war ends.
  September 20 Collapses from loss of blood. Relief team is disbanded.
1946 January 28 Appointed professor at Nagasaki Medical College.
  July Collapses at the Nagasaki Station.
  August Finishes "Nagasaki no Kane".
  November 17

After preseuting the results of his research on "Atomic Illness and Atomic Medicine" at Nagasaki Medical College, he is confined to bed.

1947 February 20 Publishes "Sekai to Nikutai" to Sumisu Shinpu.
1948 January 17 Finishes "Horobinu Mono wo".
  March Moves to the tiny house called Nyokodo ("As Yourself Hermitage").
  March 25 Finishes "Rozario no Kusari".
  April 30 Finishes "Kono Ko wo Nokoshite".
  August Retires on rest leave from Nagasaki Medical College and finishes "Seimei no Kawa".
  October 18 Receives a visit from Helen Keller at Nyokodo.
  December Receives the Kyushu Times Culture Award. Plants the "thousand cherry trees" in Urakami.
1949 January Publishes "Nagasaki no Kane"
  March Finishes "Hanasaku Oka".
  May 27 Meets Emperor Showa at Nagasaki Medical College Hospital.
  May 30 Receives a visit from a messenger of the Pope.
  August 1 Receives commendation from the mayor of Nagasaki.
  September 30 Retires from Nagasaki Medical College.
  October 30 Publishes "Itoshi Ko Yo".
  December 3 Decorated as an honorary citizen of Nagasaki.
1950 May 14 Receives a visit from a papal messenger and a gift of a rosary from the Pope.
  June 1 Receives commendation from Prime Minister Shigeru Yoshida and a silver cup from Emperor Showa.
  August A preview of the movie Nagasaki no Kane is shown at Nyokodo.
1951 April 22 Finishes his last book "Otome Toge".
  April 25 Suffers internal bleeding in his right shoulder and becomes unable to write.
  May 1 Enters Nagasaki University Hospital and passes away at 9:50 p.m. (43 years old).
  May 3 Remembered in a Catholic funeral.
  May 14 Remembered in a public funeral by Nagasaki City and buried at Sakamoto International Cemetery.
1952 September 15 "Otome Toge" is published.
1957 December 20 "Nyokodo Zuihitsu " is published.